--+------------------------------------------------------------------+
--|                               Copyright © 2017, Gehtsoft USA LLC | 
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  | 
--|                                    Paypal: https://goo.gl/9Rj74e |
--|                    BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF  |  
--+------------------------------------------------------------------+
function Init()
    strategy:name("Set stop by fractals");
    strategy:description("Strategy changes stop followiung to the fractals");

    strategy.parameters:addGroup("Asymmetric Fractal Parameters");
    strategy.parameters:addInteger("FrameBefore", "Number of bars before fractal", "Number of bars before fractal", 5);
    strategy.parameters:addInteger("FrameAfter", "Number of bars after fractal", "Number of bars after fractal", 2);

    
    strategy.parameters:addGroup("Stop Parameters");
    strategy.parameters:addInteger("Indent", "Indent from fractal", "", 0, 0, 1000);
    strategy.parameters:addBoolean("MoveBack", "Move stop back", "", false);

    strategy.parameters:addString("Type", "Price type", "", "Bid");
    strategy.parameters:addStringAlternative("Type", "Bid", "", "Bid");
    strategy.parameters:addStringAlternative("Type", "Ask", "", "Ask");
    strategy.parameters:addString("Period", "Timeframe", "", "m1");
    strategy.parameters:setFlag("Period", core.FLAG_PERIODS);

    strategy.parameters:addGroup("Trade");
    strategy.parameters:addString("Trade", "Choose Trade", "", "");
    strategy.parameters:setFlag("Trade", core.FLAG_TRADE);
end

local tradeExist = true;
local first = true;
local stopOrder = nil;      -- the identifier of the stop order
local tsource = nil;
local timer;
local minChange;
local executing = false;
local FrameBefore, FrameAfter;
function Prepare(onlyName)
    local name;
    name = profile:id() .. "(" .. instance.bid:instrument()  .. "[" .. instance.parameters.Period  .. "]" ..        instance.parameters.Trade .. ")";
    instance:name(name);
    if onlyName then
        return ;
    end
	
	FrameBefore= instance.parameters.FrameBefore;
	FrameAfter= instance.parameters.FrameAfter;

    minChange = math.pow(10, -instance.bid:getPrecision());

    ExtSetupSignal(name .. ":", true);
    tsource = ExtSubscribe(1, nil, instance.parameters.Period, instance.parameters.Type == "Bid", "bar");
end

function ExtUpdate(id, source, period)
    if id ~= 1 or not tradeExist then
	return;
	end
	
	

        if period < tsource:first()+FrameBefore then
		return;
		end
		
		
            -- check whether trade exists
            local trade, order;

            if not(core.host:execute("isTableFilled", "trades")) then
                core.host:trace("not filled");
                -- relogin??
                return ;
            end

            if not(core.host:execute("isReadyForTrade")) then
                -- relogin??
                core.host:trace("not ready");
                return ;
            end

            trade = core.host:findTable("trades"):find("TradeID", instance.parameters.Trade);

            if trade == nil then
                tradeExist = false;
                terminal:alertMessage(instance.bid:instrument(), instance.bid[NOW], "Trade " .. instance.parameters.Trade .. " disappear", instance.bid:date(NOW));
                core.host:execute("stop");
                return ;
            end
			
			

            local stopValue, valuemap, success, msg;
            local stopSide;
            local Fl=true;
            if trade.BS == "B" then
                for i=1,FrameBefore,1 do
                 if  tsource.low[period-FrameAfter]>=tsource.low[period-i-FrameAfter] then
				  
                  Fl=false;
                 end
                end
                if Fl==true then
                 stopValue=tsource.low[period-FrameBefore]-instance.parameters.Indent*instance.bid:pipSize();
                 if instance.parameters.MoveBack==false then
                  if trade.StopOrderID ~= "" and trade.StopOrderID ~= nil then
                   if stopValue<trade.Stop then
                    return ;
                   end
                  end 
                 end 
                else
                 return ;
                end
                stopSide = "S";
                if stopValue >= instance.bid[NOW] then
                    --core.host:trace(string.format("not passed %f >= %f", stopValue, instance.bid[NOW]));
                    return ;
                end
            else
                for i=1,FrameBefore,1 do
                 if  tsource.high[period-FrameAfter]<=tsource.high[period-i-FrameAfter] then
                  Fl=false;
                 end
                end
                if Fl==true then
                 stopValue=tsource.high[period-FrameBefore]+instance.parameters.Indent*instance.bid:pipSize();
                 if instance.parameters.MoveBack==false then
                  if trade.StopOrderID ~= "" and trade.StopOrderID ~= nil then
                   if stopValue>trade.Stop then
                    return ;
                   end
                  end 
                 end 
                else
                 return ;
                end
                stopSide = "B";
                if stopValue <= instance.ask[NOW] then
                    --core.host:trace(string.format("not passed %f <= %f", stopValue, instance.ask[NOW]));
                    return ;
                end
            end

			
   for i=1, FrameAfter, 1 do
	   if tsource.high[period-FrameAfter]<=tsource.high[period-FrameAfter+i] then
		return ;
	   end
	   if tsource.low[period-FrameAfter]>=tsource.low[period-FrameAfter+i] then
		return ;
	   end
  end
			

            if trade.StopOrderID == "" or trade.StopOrderID == nil then
                valuemap = core.valuemap();
                valuemap.Command = "CreateOrder";
                valuemap.OrderType = "S";
                valuemap.OfferID = trade.OfferID;
                valuemap.AcctID = trade.AccountID;
                valuemap.TradeID = trade.TradeID;
                valuemap.Quantity = trade.Lot;
                valuemap.Rate = stopValue;
                valuemap.BuySell = stopSide;
                executing = true;
                success, msg = terminal:execute(200, valuemap);
                if not(success) then
                    executing = false;
                    terminal:alertMessage(instance.bid:instrument(), instance.bid[NOW], "Failed create stop " .. msg, instance.bid:date(NOW));
                end
            else
                if math.abs(stopValue - trade.Stop) > minChange then
                    -- stop exists
                    valuemap = core.valuemap();
                    valuemap.Command = "EditOrder";
                    valuemap.AcctID = trade.AccountID;
                    valuemap.OrderID = trade.StopOrderID;
                    valuemap.Rate = stopValue;
                    executing = true;
                    success, msg = terminal:execute(200, valuemap);
                    if not(success) then
                        executing = false;
                        terminal:alertMessage(instance.bid:instrument(), instance.bid[NOW], "Failed change stop " .. msg, instance.bid:date(NOW));
                    end
                end
            end
        

    
end

function ExtAsyncOperationFinished(id, success, message)
    if id == 200 then
        executing = false;
        if not(success) then
            terminal:alertMessage(instance.bid:instrument(), instance.bid[NOW], "Failed create/change stop " .. message, instance.bid:date(NOW));
        end
    end
end





dofile(core.app_path() .. "\\strategies\\standard\\include\\helper.lua");