--Available @  https://fxcodebase.com/code/viewtopic.php?f=17&t=75302

--+------------------------------------------------------------------------------------------------+
--|                                                            Copyright © 2024, Gehtsoft USA LLC  | 
--|                                                                         http://fxcodebase.com  |
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                               https://appliedmachinelearning.systems/contact/  | 
--+------------------------------------------------------------------------------------------------+

--+------------------------------------------------------------------------------------------------+
--|                                           Our work would not be possible without your support. |
--+------------------------------------------------------------------------------------------------+
--|                                                               Paypal:  https://goo.gl/9Rj74e   |
--|                                                             Patreon :  http://tiny.cc/1ybwxz   |  
--|                                                      Buy Me a Coffee:  http://tiny.cc/bj7vxz   | 
--+------------------------------------------------------------------------------------------------+

local vars = {};
function Init()
    indicator:name("Gaps Trend [ChartPrime]");
    indicator:description("Gaps Trend [ChartPrime]");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
    indicator.parameters:addDouble("param1", "Filter Gaps", "", 0.5);
    indicator.parameters:addBoolean("param2", "Show Gap Levels", "", false);
    indicator.parameters:addBoolean("param3", "", "", true);
    indicator.parameters:addInteger("param4", "Trailing Stop Length", "", 10);
    indicator.parameters:addColor("param5", "Bullish Color", "", Graphics:GetColor(Graphics:AddTransparency(core.rgb(23, 209, 191), 0)));
    indicator.parameters:addColor("param6", "Bearish Color", "", Graphics:GetColor(Graphics:AddTransparency(core.rgb(188, 37, 214), 0)));
end

local source;
local plot1;
local plot2;
local plot3;
function Create_detectFairValueGap()
    local local_vars = {};
    local_vars["fvg_upper"] = instance:addInternalStream(0, 0);
    local_vars["fvg_lower"] = instance:addInternalStream(0, 0);
    Line:Prepare(100);
    local firstCall = true;
    return {
        Clear = function()
            firstCall = true;
        end,
        GetValue = function(period, mode)
            if firstCall then
                firstCall = false;
        SafeSetFloat(local_vars["fvg_upper"], period, nil);
        SafeSetFloat(local_vars["fvg_lower"], period, nil);
            else
        SafeSetFloat(local_vars["fvg_upper"], period, SafeGetFloat(local_vars["fvg_upper"], period - 1));
        SafeSetFloat(local_vars["fvg_lower"], period, SafeGetFloat(local_vars["fvg_lower"], period - 1));
            end
            gaps_levels = Array:NewLine(1, ToLine(nil));
            bullish_gap_condition = SafeGreater(source.low:tick(period), source.high:tick(period - 2)) and SafeGreater(source.high:tick(period - 1), source.high:tick(period - 2)) and SafeGreater(bullish_gap_size, vars["gap_filter"]);
            bearish_gap_condition = SafeLess(source.high:tick(period), source.low:tick(period - 2)) and SafeLess(source.low:tick(period - 1), source.low:tick(period - 2)) and SafeGreater(bearish_gap_size, vars["gap_filter"]);
            if bullish_gap_condition then
                SafeSetFloat(local_vars["fvg_upper"], period, source.high:tick(period - 2));
                SafeSetFloat(local_vars["fvg_lower"], period, source.low:tick(period));
                gaps_levels:Push(Line:New(period - 2, SafeGetFloat(local_vars["fvg_upper"], period), period - 2, SafeGetFloat(local_vars["fvg_upper"], period)):SetColor(vars["bull_color"]):SetStyle("dashed"));
                Box:New(core.formatDate(source:date(period - 2)), "1", period - 2, SafeGetFloat(local_vars["fvg_upper"], period), period + 3, SafeGetFloat(local_vars["fvg_lower"], period)):SetBgColor(vars["bull_color"] + math.floor(60 / 100 * 255) * 16777216):SetBorderColor(nil):SetText(Str:ToString(Round(bullish_gap_size, 2))):SetTextColor(core.COLOR_LABEL):SetTextHAlign("right"):SetTextSize("tiny");
            end
            if bearish_gap_condition then
                SafeSetFloat(local_vars["fvg_upper"], period, source.low:tick(period - 2));
                SafeSetFloat(local_vars["fvg_lower"], period, source.high:tick(period));
                gaps_levels:Push(Line:New(period - 2, SafeGetFloat(local_vars["fvg_upper"], period), period - 2, SafeGetFloat(local_vars["fvg_upper"], period)):SetColor(vars["bear_color"]):SetStyle("dashed"));
                Box:New(core.formatDate(source:date(period - 2)), "2", period - 2, SafeGetFloat(local_vars["fvg_upper"], period), period + 3, SafeGetFloat(local_vars["fvg_lower"], period)):SetBgColor(vars["bear_color"] + math.floor(60 / 100 * 255) * 16777216):SetBorderColor(nil):SetText(Str:ToString(Round(bearish_gap_size, 2))):SetTextColor(core.COLOR_LABEL):SetTextHAlign("right"):SetTextSize("tiny");
            end
            if vars["show_fvg_levels"] then
                local for1_from = 0;
                local for1_to = SafeMinus(gaps_levels:Size(), 1);
                local for1_step = for1_from > for1_to and 1 or -1;
                if not for1_from or not for1_to then return; end
                for i = for1_from, for1_to, for1_step do
                    line_id = Array:Get(gaps_levels, i);
                    level = Line:GetY1(line_id);
                    if SafeGreater(source.high:tick(period), level) and SafeLess(source.low:tick(period), level) then
                        Line:SetX2(line_id, period);
                        Array:Set(gaps_levels, i, ToLine(nil));
                    end
                end
            end
            return bullish_gap_condition, bearish_gap_condition, SafeGetFloat(local_vars["fvg_upper"], period);
        end
    };
end
function Prepare(nameOnly)
    source = instance.source;
    local name = string.format("%s(%s)", profile:id(), source:name());
    instance:name(name);
    if nameOnly then
        return;
    end
    vars["gap_filter"] = instance.parameters.param1;
    vars["show_fvg_levels"] = instance.parameters.param2;
    vars["enable_trailing"] = instance.parameters.param3;
    vars["trailing_length"] = instance.parameters.param4;
    vars["bull_color"] = Graphics:AddTransparency(instance.parameters.param5, Graphics:GetTransparencyPercent(Graphics:AddTransparency(core.rgb(23, 209, 191), 0)));
    vars["bear_color"] = Graphics:AddTransparency(instance.parameters.param6, Graphics:GetTransparencyPercent(Graphics:AddTransparency(core.rgb(188, 37, 214), 0)));
    vars["fvg_color"] = instance:addInternalStream(0, 0);
    vars["trend_direction"] = instance:addInternalStream(0, 0);
    vars["trailing_stop"] = instance:addInternalStream(0, 0);
    vars["stdev1"] = instance:addInternalStream(0, 0);
    vars["stdev2"] = instance:addInternalStream(0, 0);
    vars["detectFairValueGapFunc1"] = Create_detectFairValueGap();
    plot1 = instance:createTextOutput("plot1", "", "Wingdings", 12, core.H_Center, core.V_Center, core.colors().Blue);
    plot2 = instance:addStream("plot2", core.Line, "", "", core.colors().Blue, 0, 0);
    plot2:setWidth(1);
    vars["ts_plot"] = plot2;
    plot3 = instance:addStream("plot3", core.Line, "", "", core.colors().Blue, 0, 0);
    plot3:setWidth(1);
    plot3:setStyle(core.LINE_NONE);
    vars["price_plot"] = plot3;
    channel1_color = core.colors().Blue;
    instance:createChannelGroup("channel1", "channel1", vars["ts_plot"], vars["price_plot"], Graphics:GetColor(channel1_color), 100 - Graphics:GetTransparencyPercent(channel1_color), true);
    instance:ownerDrawn(true);
end

function Update(period, mode)
    if period == 0 or mode == core.UpdateAll then
        Line:Clear();
        Box:Clear();
        SafeSetFloat(vars["fvg_color"], period, Color(nil));
        SafeSetBool(vars["trend_direction"], period, nil);
        SafeSetFloat(vars["trailing_stop"], period, nil);
        vars["detectFairValueGapFunc1"].Clear();
    else
        SafeSetFloat(vars["fvg_color"], period, SafeGetFloat(vars["fvg_color"], period - 1));
        SafeSetBool(vars["trend_direction"], period, SafeGetBool(vars["trend_direction"], period - 1));
        SafeSetFloat(vars["trailing_stop"], period, SafeGetFloat(vars["trailing_stop"], period - 1));
    end
    trailing_highs = Array:NewFloat(1, nil);
    trailing_lows = Array:NewFloat(1, nil);
    SafeSetFloat(vars["stdev1"], period, SafeMinus(source.low:tick(period - 2), source.high:tick(period)));
    if vars["stdev1"]:first() > period - 100 then return; end
    bearish_gap_size = SafeDivide((SafeMinus(source.low:tick(period - 2), source.high:tick(period))), mathex.stdev(vars["stdev1"], core.rangeTo(period, 100)));
    SafeSetFloat(vars["stdev2"], period, SafeMinus(source.low:tick(period), source.high:tick(period - 2)));
    if vars["stdev2"]:first() > period - 100 then return; end
    bullish_gap_size = SafeDivide((SafeMinus(source.low:tick(period), source.high:tick(period - 2))), mathex.stdev(vars["stdev2"], core.rangeTo(period, 100)));
    bullish_gap_detected_ret_val, bearish_gap_detected_ret_val, fvg_upper_ret_val = vars["detectFairValueGapFunc1"].GetValue(period, mode);
    vars["bullish_gap_detected"] = bullish_gap_detected_ret_val;
    vars["bearish_gap_detected"] = bearish_gap_detected_ret_val;
    vars["fvg_upper"] = fvg_upper_ret_val;
    if vars["bullish_gap_detected"] then
        SafeSetFloat(vars["fvg_color"], period, vars["bull_color"]);
    elseif vars["bearish_gap_detected"] then
        SafeSetFloat(vars["fvg_color"], period, vars["bear_color"]);
    end
    local for2_from = 0;
    local for2_to = vars["trailing_length"];
    local for2_step = for2_from > for2_to and 1 or -1;
    if not for2_from or not for2_to then return; end
    for i = for2_from, for2_to, for2_step do
        trailing_lows:Push(source.low:tick(period - i));
        trailing_highs:Push(source.high:tick(period - i));
    end
    if SafeGetBool(vars["trend_direction"], period) then
        SafeSetFloat(vars["trailing_stop"], period, trailing_lows:Min());
    elseif not (SafeGetBool(vars["trend_direction"], period)) then
        SafeSetFloat(vars["trailing_stop"], period, trailing_highs:Max());
    end
    if (SafeGetFloat(vars["trailing_stop"], period) == source.low:tick(period)) then
        SafeSetFloat(vars["trailing_stop"], period, nil);
    elseif (SafeGetFloat(vars["trailing_stop"], period) == source.high:tick(period)) then
        SafeSetFloat(vars["trailing_stop"], period, nil);
    end
    trend_color = Triary(SafeGreater(source.close:tick(period), SafeGetFloat(vars["trailing_stop"], period)), vars["bull_color"], vars["bear_color"]);
    if source.close:first() > period - 1 then return; end
    if vars["trailing_stop"]:first() > period - 1 then return; end
    plot1_series = Triary(core.crosses(source.close, vars["trailing_stop"], period), SafeGetFloat(vars["trailing_stop"], period), nil);
    if plot1_series then
        plot1:set(period, plot1_series, "\116", "");
    else
        plot1:setNoData(period);
    end
    if source.close:first() > period - 1 then return; end
    if vars["trailing_stop"]:first() > period - 1 then return; end
    plot2[period] = Triary(vars["enable_trailing"], (Triary(core.crosses(source.close, vars["trailing_stop"], period), nil, SafeGetFloat(vars["trailing_stop"], period))), nil);
    plot2:setColor(period, trend_color);
    plot3[period] = (source.high:tick(period) + source.low:tick(period)) / 2;
end
function Draw(stage, context)
    Line:Draw(stage, context);
    Box:Draw(stage, context);
end

function AsyncOperationFinished(cookie, success, message, message1, message2)
end
Graphics = {};
Graphics.NextId = 1;
Graphics.Pens = {};
Graphics.Brushes = {};
Graphics.Fonts = {};
function Graphics:FindPen(width, color, style, context)
    if color == nil then
        return -1;
    end
    for i, pen in ipairs(Graphics.Pens) do
        if pen.Width == width and pen.Color == color then
            context:createPen(pen.Id, context:convertPenStyle(style), width, color);
            return pen.Id;
        end
    end
    local newPen = {};
    newPen.Id = Graphics.NextId;
    newPen.Width = width;
    newPen.Color = color;

    context:createPen(newPen.Id, context:convertPenStyle(style), width, color);
    Graphics.NextId = Graphics.NextId + 1;
    Graphics.Pens[#Graphics.Pens + 1] = newPen;
    return newPen.Id;
end
function Graphics:FindBrush(color, context)
    if color == nil then
        return -1;
    end
    for i, brush in ipairs(Graphics.Brushes) do
        if brush.Color == color then
            context:createSolidBrush(brush.Id, color)
            return brush.Id;
        end
    end
    local newBrush = {};
    newBrush.Id = Graphics.NextId;
    newBrush.Color = color;
    context:createSolidBrush(newBrush.Id, color)
    Graphics.NextId = Graphics.NextId + 1;
    Graphics.Brushes[#Graphics.Brushes + 1] = newBrush;
    return newBrush.Id;
end
function Graphics:FindFont(font, xSize, ySize, corner, context)
    for i, font in ipairs(self.Fonts) do
        if font.xSize == xSize and font.Name == font then
            return font.Id;
        end
    end
    local newFont = {};
    newFont.Id = Graphics.NextId;
    newFont.xSize = xSize;
    newFont.Name = font;
    context:createFont(newFont.Id, font, 0, xSize, context.LEFT);
    Graphics.NextId = Graphics.NextId + 1;
    Graphics.Fonts[#Graphics.Fonts + 1] = newFont;
    return newFont.Id;
end
function Graphics:SplitColorAndTransparency(clr)
    if clr == nil then
        return nil, nil;
    end
    local transparency = (math.floor(clr / 16777216) % 255);
    local color = clr - transparency * 16777216;
    return color, transparency;
end
function Graphics:GetColor(clr)
    local color, transparency = self:SplitColorAndTransparency(clr);
    return color;
end
function Graphics:GetTransparency(clr)
    local color, transparency = self:SplitColorAndTransparency(clr);
    return transparency;
end
function Graphics:GetTransparencyPercent(clr)
    local color, transparency = self:SplitColorAndTransparency(clr);
    return math.floor(transparency * 100.0 / 255.0 + 0.5);
end
function Graphics:AddTransparency(clr, transp)
    if clr == nil then
        return nil;
    end
    color, _ = Graphics:SplitColorAndTransparency(clr);
    return color + math.floor(transp / 100 * 255) * 16777216;
end
Array = {};
function Array:Enum(array)
    if array == nil then
        return {};
    end
    return array.arr;
end
function Array:Clear(array)
    if array == nil then
        return;
    end
    array:Clear();
end
function Array:Copy(array)
    if array == nil then
        return;
    end
    return array:Copy();
end
function Array:Get(array, index)
    if array == nil then
        return;
    end
    return array:Get(index);
end
function Array:Join(array, separator)
    if array == nil then
        return;
    end
    return array:Join(separator);
end
function Array:Reverse(array)
    if array == nil then
        return;
    end
    return array:Reverse();
end
function Array:Remove(array, index)
    if array == nil then
        return;
    end
    return array:Remove(index);
end
function Array:Max(array)
    local maxVal = array:Get(0);
    for i = 1, array:Size() - 1 do
        local val = array:Get(i);
        if maxVal == nil or (val ~= nil and maxVal < val) then
            maxVal = val;
        end
    end
    return maxVal;
end
function Array:Min(array)
    local minVal = array:Get(0);
    for i = 1, array:Size() - 1 do
        local val = array:Get(i);
        if minVal == nil or (val ~= nil and minVal > val) then
            minVal = val;
        end
    end
    return minVal;
end
function Array:Pop(array)
    if array == nil then
        return nil;
    end
    return array:Pop();
end
function Array:Set(array, index, value)
    if array == nil then
        return;
    end
    array:Set(index, value);
end
function Array:Fill(array, value, from, to)
    if array == nil then
        return;
    end
    array:Fill(value, from, to);
end
function Array:IndexOf(array, value)
    if array == nil then
        return -1;
    end
    return array:IndexOf(value);
end
function Array:NewArray(size, initialValue)
    local newArray = {};
    newArray.arr = {};
    newArray.size = size;
    for i = 1, size, 1 do
        newArray.arr[i] = initialValue;
    end
    function newArray:Push(item) self.size = self.size + 1; self.arr[#self.arr + 1] = item; end
    function newArray:Get(index) return self.arr[index + 1]; end
    function newArray:Set(index, value) self.arr[index + 1] = value; end
    function newArray:Max() return Array:Max(self); end
    function newArray:Min() return Array:Min(self); end
    function newArray:Size() return self.size; end
    function newArray:Clear()
        self.arr = {};
        self.size = 0;
    end
    function newArray:Pop()
        local lastVal = self.arr[self.size];
        table.remove(self.arr, self.size);
        self.size = self.size - 1;
        return lastVal;
    end
    function newArray:Fill(value, from, to)
        if to == nil then
            to = self.size - 1;
        end
        for i = from, to, 1 do
            self.arr[i + 1] = value;
        end
    end
    function newArray:IndexOf(value)
        for i, v in ipairs(self.arr) do
            if v == value then
                return i;
            end
        end
        return -1;
    end
    function newArray:Sum()
        local sum = 0;
        for i, v in ipairs(self.arr) do
            sum = sum + v;
        end
        return sum;
    end
    function newArray:Copy()
        local arrayCopy = Array:NewArray(self.size, nil);
        for i = 1, self.size, 1 do
            arrayCopy.arr[i] = self.arr[i];
        end
        return arrayCopy;
    end
    function newArray:Reverse()
        local half = math.floor(self.size / 2);
        for i = 1, half, 1 do
            local swapped = self.arr[self.size - i + 1];
            self.arr[self.size - i + 1] = self.arr[i];
            self.arr[i] = swapped;
        end
    end
    function newArray:Unshift(value)
        local nextValue = value;
        for i = 1, self.size, 1 do
            local current = self.arr[i];
            self.arr[i] = nextValue;
            nextValue = current;
        end
        self.arr[self.size + 1] = nextValue;
        self.size = self.size + 1;
    end
    function newArray:Join(separator)
        if self.size == 0 then
            return "";
        end
        local str = tostring(self.arr[1]);
        for i = 2, self.size, 1 do
            if self.arr[i] ~= nil then
                str = str .. separator .. tostring(self.arr[i]);
            end
        end
        return str;
    end
    function newArray:Shift()
        local value = self.arr[1];
        table.remove(self.arr, 1);
        self.size = self.size - 1;
        return value;
    end
    function newArray:Remove(index)
        local value = self.arr[index];
        table.remove(self.arr, index);
        self.size = self.size - 1;
        return value;
    end
    function newArray:Slice(from, to)
        local slice = {};
        slice.Parent = self;
        slice.From = from;
        slice.To = to;
        function slice:Get(index)
            return self.Parent:Get(index + self.From);
        end
        function slice:Size()
            return self.To - self.From;
        end
        function slice:Max()
            return Array:Max(self);
        end
        function slice:Min()
            return Array:Min(self);
        end
        return slice;
    end
    return newArray;
end
function Array:NewLine(size, initialValue)
    return Array:NewArray(size, initialValue);
end
function Array:NewInt(size, initialValue)
    return Array:NewArray(size, initialValue);
end
function Array:NewFloat(size, initialValue)
    return Array:NewArray(size, initialValue);
end
function Array:NewLabel(size, initialValue)
    return Array:NewArray(size, initialValue);
end
function Array:NewString(size, initialValue)
    return Array:NewArray(size, initialValue);
end
function Array:NewBox(size, initialValue)
    return Array:NewArray(size, initialValue);
end
function SafeMinus(left, right)
    if left == nil or right == nil then
        return nil;
    end
    return left - right;
end
function SafeMultiply(left, right)
    if left == nil or right == nil then
        return nil;
    end
    return left * right;
end
function SafePlus(left, right)
    if left == nil or right == nil then
        return nil;
    end
    return left + right;
end
function SafeConcat(left, right)
    if left == nil then
        return right;
    end
    if right == nil then
        return left;
    end
    return left .. right;
end
function SafeDivide(left, right)
    if left == nil or right == nil or right == 0 then
        return nil;
    end
    return left / right;
end
function SafeGreater(left, right)
    if left == nil or right == nil then
        return nil;
    end
    return left > right;
end
function SafeGE(left, right)
    if left == nil or right == nil then
        return nil;
    end
    return left >= right;
end
function SafeLess(left, right)
    if left == nil or right == nil then
        return nil;
    end
    return left < right;
end
function SafeLE(left, right)
    if left == nil or right == nil then
        return nil;
    end
    return left <= right;
end
function SafeMax(left, right)
    if left == nil or right == nil then
        return nil;
    end
    return math.max(left, right);
end
function SafeMin(left, right)
    if left == nil or right == nil then
        return nil;
    end
    return math.min(left, right);
end
function SafeAbs(value)
    if value == nil then
        return nil;
    end
    return math.abs(value);
end
function SafeNegative(left)
    if left == nil then
        return nil;
    end
    return -left;
end
function SafeSetBool(stream, period, value)
    if value == nil then
        stream:setNoData(period);
        return;
    end
    stream[period] = value and 1 or 0;
end
function SafeGetBool(stream, period)
    if not stream:hasData(period) then
        return nil;
    end
    return stream[period] == 1;
end
function SafeSetFloat(stream, period, value)
    if value == nil then
        stream:setNoData(period);
        return;
    end
    stream[period] = value;
end
function SafeGetFloat(stream, period)
    if not stream:hasData(period) then
        return nil;
    end
    return stream[period];
end
function Float(number)
    return number and number or nil;
end
function Int(number)
    return number and number or nil;
end
function Color(color)
    return color and color or nil;
end
function ToLine(line)
    return line;
end
function Round(num, idp)
    if num == nil then
        return nil;
    end
    if idp and idp > 0 then
        local mult = 10 ^ idp
        return math.floor(num * mult + 0.5) / mult
    end
    return math.floor(num + 0.5)
end
function Nz(value, defaultValue)
    if defaultValue == nil then
        defaultValue = 0;
    end
    return value and value or defaultValue;
end
function Triary(condition, trueValue, falseValue)
    if condition == nil or condition == false then
        return falseValue;
    end
    return trueValue;
end
Line = {};
Line.AllLines = {};
function Line:GetAll()
    local array = {};
    array.arr = Line.AllLines;
    return array;
end
function Line:Clear()
    Line.AllLines = {};
end
function Line:Prepare(max_lines_count)
    Line.max_lines_count = max_lines_count;
end
function Line:SetXY1(line, x, y)
    if line == nil then
        return;
    end
    line:SetXY1(x, y);
end
function Line:SetXY2(line, x, y)
    if line == nil then
        return;
    end
    line:SetXY2(x, y);
end
function Line:SetX1(line, x)
    if line == nil then
        return;
    end
    line:SetX1(x);
end
function Line:SetX2(line, x)
    if line == nil then
        return;
    end
    line:SetX2(x);
end
function Line:SetY1(line, y)
    if line == nil then
        return;
    end
    line:SetY1(y);
end
function Line:SetY2(line, y)
    if line == nil then
        return;
    end
    line:SetY2(y);
end
function Line:GetX1(line)
    if line == nil then
        return;
    end
    return line:GetX1();
end
function Line:GetX2(line)
    if line == nil then
        return;
    end
    return line:GetX2();
end
function Line:GetY1(line)
    if line == nil then
        return;
    end
    return line:GetY1();
end
function Line:GetY2(line)
    if line == nil then
        return;
    end
    return line:GetY2();
end
function Line:SetColor(line, clr)
    if line == nil then
        return;
    end
    line:SetColor(clr);
end
function Line:SetWidth(line, width)
    if line == nil then
        return;
    end
    line:SetWidth(width);
end
function Line:SetStyle(line, style)
    if line == nil then
        return;
    end
    line:SetStyle(style);
end
function Line:SetExtend(line, extend)
    if line == nil then
        return;
    end
    line:SetExtend(extend);
end
function Line:SetXLoc(line, x1, x2, xloc)
    if line == nil then
        return;
    end
    line:SetXLoc(x1, x2, xloc);
end
function Line:New(x1, y1, x2, y2)
    local newLine = {};
    newLine.X1 = x1;
    newLine.Y1 = y1;
    newLine.X2 = x2;
    newLine.Y2 = y2;
    function newLine:SetXY1(x, y)
        self.X1 = x;
        self.Y1 = y;
        return self;
    end
    function newLine:SetXY2(x, y)
        self.X2 = x;
        self.Y2 = y;
        return self;
    end
    function newLine:SetX1(x)
        self.X1 = x;
        return self;
    end
    function newLine:SetX2(x)
        self.X2 = x;
        return self;
    end
    newLine.XLoc = "bar_index";
    function newLine:SetXLoc(x1, x2, xloc)
        newLine.X1 = x1;
        newLine.X2 = x2;
        newLine.XLoc = xloc;
        return self;
    end
    function newLine:SetY1(y)
        self.Y1 = y;
        return self;
    end
    function newLine:SetY2(y)
        self.Y2 = y;
        return self;
    end
    function newLine:GetX1()
        return self.X1;
    end
    function newLine:GetX2()
        return self.X2;
    end
    function newLine:GetY1()
        return self.Y1;
    end
    function newLine:GetY2()
        return self.Y2;
    end
    newLine.Color = core.colors().Blue;
    function newLine:SetColor(clr)
        self.ColorTransparency = (math.floor(clr / 16777216) % 255);
        self.Color = clr - self.ColorTransparency * 16777216;
        self.PenId = nil;
        return self;
    end
    newLine.Width = 1;
    function newLine:SetWidth(width)
        self.Width = width;
        self.PenId = nil;
        return self;
    end
    newLine.Extend = "none";
    function newLine:SetExtend(extend)
        self.Extend = extend;
        return self;
    end
    newLine.Style = "solid";
    function newLine:SetStyle(style)
        self.Style = style;
        self.PenId = nil;
        return self;
    end
    function newLine:getStyleForContext()
        if self.Style == "solid" or self.Style == "arrow_left" or self.Style == "arrow_both" or self.Style == "arrow_right" then
            return core.LINE_SOLID;
        elseif self.Style == "dotted" then
            return core.LINE_DOT;
        elseif self.Style == "dashed" then
            return core.LINE_DASH;
        end
        return core.LINE_SOLID;
    end
    function newLine:converXToPoints(context, x)
        if self.XLoc == "bar_time" then
            return context:positionOfDate(x / 86400000);
        end
        local _, x1 = context:positionOfBar(x);
        return x1;
    end
    function newLine:Draw(stage, context)
        if self.Y1 == nil or self.Y2 == nil or self.X1 == nil or self.X2 == nil then
            return;
        end
        if self.PenId == nil then
            self.PenId = Graphics:FindPen(self.Width, self.Color, self:getStyleForContext(), context);
        end
        local x1 = self:converXToPoints(context, self.X1);
        local x2 = self:converXToPoints(context, self.X2);
        local _, y1 = context:pointOfPrice(self.Y1);
        local _, y2 = context:pointOfPrice(self.Y2);
        context:drawLine(self.PenId, x1, y1, x2, y2, self.ColorTransparency);
        if self.Extend == "right" or self.Extend == "both" then
            local a, c = math2d.lineEquation(x1, y1, x2, y2);
            local y3 = a * context:right() + c;
            context:drawLine(self.PenId, x2, y2, context:right(), y3, self.ColorTransparency);
        end
        if self.Extend == "left" or self.Extend == "both" then
            local a, c = math2d.lineEquation(x1, y1, x2, y2);
            local y3 = a * context:left() + c;
            context:drawLine(self.PenId, x1, y1, context:left(), y3, self.ColorTransparency);
        end
    end
    self.AllLines[#self.AllLines + 1] = newLine;
    if #self.AllLines > self.max_lines_count then
        table.remove(self.AllLines, 1);
    end
    return newLine;
end
function Line:Delete(line)
    for i = 1, #self.AllLines do
        if self.AllLines[i] == line then
            table.remove(self.AllLines, i);
            return;
        end
    end
end
function Line:Draw(stage, context)
    if stage ~= 2 then
        return;
    end
    for i, value in ipairs(self.AllLines) do
        value:Draw(stage, context);
    end
end
Box = {};
Box.AllBoxs = {};
Box.AllSeries = {};
function Box:Clear()
    Box.AllBoxs = {};
    Box.AllSeries = {};
end
function Box:SetRight(box, right)
    if box == nil then
        return;
    end
    box:SetRight(right);
end
function Box:SetLeft(box, left)
    if box == nil then
        return;
    end
    box:SetLeft(left);
end
function Box:GetBottom(box)
    if box == nil then
        return nil;
    end
    return box:GetBottom();
end
function Box:GetTop(box)
    if box == nil then
        return nil;
    end
    return box:GetTop();
end
function Box:GetLeft(box)
    if box == nil then
        return nil;
    end
    return box:GetLeft();
end
function Box:GetRight(box)
    if box == nil then
        return nil;
    end
    return box:GetRight();
end
function Box:SetText(box, text)
    if box == nil then
        return;
    end
    box:SetText(text);
end
function Box:SetTextColor(box, text_color)
    if box == nil then
        return;
    end
    box:SetTextColor(text_color);
end
function Box:SetTextHAlign(box, text_halign)
    if box == nil then
        return;
    end
    box:SetTextHAlign(text_halign);
end
function Box:SetTextSize(box, text_size)
    if box == nil then
        return;
    end
    box:SetTextSize(text_size);
end
function Box:SetBorderStyle(box, style)
    if box == nil then
        return;
    end
    box:SetBorderStyle(style);
end
function Box:New(id, seriesId, left, top, right, bottom)
    local newBox = {};
    newBox.SeriesId = seriesId;
    newBox.Left = left;
    function newBox:SetLeft(left)
        self.Left = left;
        return self;
    end
    function newBox:GetLeft()
        return self.Left;
    end
    newBox.Top = top;
    function newBox:GetTop()
        return self.Top;
    end
    newBox.Right = right;
    function newBox:SetRight(right)
        self.Right = right;
        return self;
    end
    function newBox:GetRight()
        return self.Right;
    end
    newBox.Bottom = bottom;
    function newBox:GetBottom()
        return self.Bottom;
    end
    newBox.BorderWidth = 1;
    newBox.BgColor = core.colors().Blue;
    function newBox:SetBgColor(clr)
        color, transparency = Graphics:SplitColorAndTransparency(clr);
        self.BgColorTransparency = transparency;
        self.BgColor = color;
        self.BrushId = nil;
        return self;
    end
    newBox.BorderColor = core.colors().Blue;
    function newBox:SetBorderColor(clr)
        color, transparency = Graphics:SplitColorAndTransparency(clr);
        self.BorderColor_transparency = transparency;
        self.BorderColor = color;
        self.PenId = nil;
        return self;
    end
    newBox.BorderStyle = "solid";
    newBox.BorderStyleIndicore = core.LINE_SOLID;
    function newBox:SetBorderStyle(style)
        self.BorderStyle = style;
        if style == "solid" or style == "arrow_right" or style == "arrow_left" or style == "arrow_both" then
            newBox.BorderStyleIndicore = core.LINE_SOLID;
        elseif style == "dotted" then
            newBox.BorderStyleIndicore = core.LINE_DOT;
        elseif style == "dashed" then
            newBox.BorderStyleIndicore = core.LINE_DASH;
        end
        self.PenId = nil;
        return self;
    end
    newBox.Text = nil;
    function newBox:SetText(text)
        self.Text = text;
        return self;
    end
    newBox.TextColor = nil;
    function newBox:SetTextColor(text_color)
        self.TextColor = text_color;
        return self;
    end
    newBox.TextHAlign = nil;
    function newBox:SetTextHAlign(text_halign)
        self.TextHAlign = text_halign;
        return self;
    end
    newBox.TextSize = nil;
    function newBox:SetTextSize(text_size)
        self.TextSize = text_size;
        return self;
    end
    function newBox:getCoordinates(context, x, y, W, H)
        return x - W / 2, y - H / 2, x + W / 2, y + H / 2;
    end
    function newBox:Draw(stage, context)
        if self.Top == nil or self.Left == nil or self.Bottom == nil or self.Right == nil then
            return;
        end
        if self.PenId == nil then
            self.PenId = Graphics:FindPen(self.BorderWidth, self.BorderColor, self.BorderStyleIndicore, context);
        end
        if self.BrushId == nil then
            self.BrushId = Graphics:FindBrush(self.BgColor, context);
        end
        _, y1 = context:pointOfPrice(self.Top);
        _, x1 = context:positionOfBar(self.Left);
        _, y2 = context:pointOfPrice(self.Bottom);
        _, x2 = context:positionOfBar(self.Right);
        context:drawRectangle(self.PenId, self.BrushId, x1, y1, x2, y2, self.BgColorTransparency)
        context:drawRectangle(self.PenId, -1, x1, y1, x2, y2)
        if self.Text ~= nil and self.Text ~= "" then
            if self.FontId == nil then
                self.FontId = Graphics:FindFont("Arial", 10, 0, context.LEFT, context);
            end
            local W, H = context:measureText(self.FontId, self.Text, context.LEFT);
            local x_from, y_from, x_to, y_to = self:getCoordinates(context, (x1 + x2) / 2, (y1 + y2) / 2, W, H);
            context:drawText(self.FontId, self.Text, self.TextColor, -1, x_from, y_from, x_to, y_to, 0);
        end
    end
    function newBox:Get(index)
        return Box.AllSeries[self.SeriesId][index + 1];
    end
    self.AllBoxs[id .. "_" .. seriesId] = newBox;
    if self.AllSeries[seriesId] == nil then
        self.AllSeries[seriesId] = {};
    end
    table.insert(self.AllSeries[seriesId], 1, newBox);
    return newBox;
end
function Box:Delete(box)
    if box == nil then
        return;
    end
    self:removeFromAllBoxes(box);
    self:removeFromSeries(box);
end
function Box:removeFromSeries(box)
    for i = 1, #self.AllSeries[box.SeriesId] do
        if self.AllSeries[box.SeriesId][i] == box then
            table.remove(self.AllSeries[box.SeriesId], i);
            return;
        end
    end
end
function Box:removeFromAllBoxes(box)
    for key, value in pairs(self.AllBoxs) do
        if value == box then
            self.AllBoxs[key] = nil;
            return;
        end
    end
end
function Box:Draw(stage, context)
    if stage ~= 2 then
        return;
    end
    for id, Box in pairs(self.AllBoxs) do
        Box:Draw(stage, context);
    end
end
Str = {};
function Str:NewVar(value)
    local var = {};
    var.items = {};
    var.items[0] = value;
    function var:Get(period)
        if period < 0 then
            return nil;
        end
        return self.items[period];
    end
    function var:Set(period, value)
        self.items[period] = value;
    end
    return var;
end
function Str:Clear()
end
function Str:doFormat(pattern, values)
    local tokens = core.parseCsv(pattern, ",");
    local value = values[tonumber(tokens[0])];
    if value == nil then
        return "";
    end
    if tokens[1] == "number" then
        if tokens[2] == "percent" then
            return tostring(math.floor(value + 0.5)) .. "%";
        end
    end
    return tostring(value);
end
function Str:Format(pattern, value0, value1, value2, value3, value4, value5, value6, value7, value8, value9)
    local values = {};
    values[0] = value0;
    values[1] = value1;
    values[2] = value2;
    values[3] = value3;
    values[4] = value4;
    values[5] = value5;
    values[6] = value6;
    values[7] = value7;
    values[8] = value8;
    values[9] = value9;

    local tokens = core.parseCsv(pattern, "{");
    local result = "";
    for i, token in ipairs(tokens) do
        local subtokens, c = core.parseCsv(token, "}");
        if c == 1 then
            result = result .. token;
        else
            result = result .. Str:doFormat(subtokens[0], values) .. subtokens[1];
        end
    end
    return result;
end
function Str:ToString(value, pattern)
    if pattern == nil then
        return tostring(value);
    end
    local luaPattern = "";
    local waitNumber = false;
    local digits = 0;
    for i = 1, #pattern do
        local char = string.sub(pattern, i, i);
        if not waitNumber then
            if char == "#" then
                waitNumber = true;
                luaPattern = luaPattern .. "%";
            else
                luaPattern = luaPattern .. char;
            end
        else
            if char == "." then
                luaPattern = luaPattern .. ".";
            elseif char == "#" then
                digits = digits + 1;
            else
                luaPattern = luaPattern .. digits .. "f";
                waitNumber = false;
                digits = 0;
            end
        end
    end
    if waitNumber then
        luaPattern = luaPattern .. digits .. "f";
        waitNumber = false;
        digits = 0;
    end
    
    return string.format(luaPattern, value);
end
function Str:Length(str)
    if str == nil then
        return 0;
    end
    return string.len(str);
end
function Str:ReplaceAll(str, from, to)
    if str == nil then
        return nil;
    end
    return string.gsub(str, from, to);
end
function Str:Upper(str)
    if str == nil then
        return nil;
    end
    return string.upper(str);
end
function Str:StartsWith(str, item)
    if str == nil then
        return nil;
    end
    return string.find(str, item) == 1;
end
function Str:Split(str, separator)
    if str == nil then
        return nil;
    end
    local items, c = core.parseCsv(str, separator);
    local arr = Array:NewString(0);
    for i = 0, c - 1 do
        arr:Push(items[i]);
    end
    return arr;
end
function SafeSetString(str, period, value)
    if str == nil then
        return;
    end
    str:Set(period, value);
end
function SafeGetString(str, period)
    if str == nil then
        return;
    end
    return str:Get(period);
end
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