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#property strict
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#property version "1.00"
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#include <Trade/Trade.mqh>
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input group "=== Market ==="
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input string InpSymbol = "BTCUSD";
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input ENUM_TIMEFRAMES InpTimeframe = PERIOD_M15;
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input double InpLots = 0.01;
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input int InpSlippagePoints = 30;
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input int InpMagic = 910001;
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input group "=== Signal ==="
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input int InpEmaPeriod = 50;
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input int InpBodyMinPoints = 100; // Minimal candle body size
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input group "=== Risk ==="
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input bool InpUseAtrStops = true;
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input int InpAtrPeriod = 14;
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input double InpSlAtrMult = 1.8;
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input double InpTpAtrMult = 3.0;
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input double InpFallbackSLPoints = 2500;
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input double InpFallbackTPPoints = 4500;
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CTrade trade;
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datetime g_lastBarTime = 0;
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bool IsNewBar(const string symbol, const ENUM_TIMEFRAMES tf)
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{
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datetime t = iTime(symbol, tf, 0);
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if(t <= 0)
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return false;
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if(t == g_lastBarTime)
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return false;
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g_lastBarTime = t;
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return true;
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}
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bool SelectOwnPosition(const string symbol, const int magic)
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{
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if(!PositionSelect(symbol))
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return false;
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return (int)PositionGetInteger(POSITION_MAGIC) == magic;
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}
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double GetAtrPoints(const string symbol, const ENUM_TIMEFRAMES tf, const int period)
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{
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int hAtr = iATR(symbol, tf, period);
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if(hAtr == INVALID_HANDLE)
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return 0.0;
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double atrBuff[1];
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if(CopyBuffer(hAtr, 0, 1, 1, atrBuff) <= 0)
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{
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IndicatorRelease(hAtr);
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return 0.0;
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}
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IndicatorRelease(hAtr);
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return atrBuff[0] / _Point;
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}
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double GetEmaValue(const string symbol, const ENUM_TIMEFRAMES tf, const int period, const int shift)
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{
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int hEma = iMA(symbol, tf, period, 0, MODE_EMA, PRICE_CLOSE);
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if(hEma == INVALID_HANDLE)
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return 0.0;
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double emaBuff[1];
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if(CopyBuffer(hEma, 0, shift, 1, emaBuff) <= 0)
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{
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IndicatorRelease(hEma);
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return 0.0;
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}
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IndicatorRelease(hEma);
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return emaBuff[0];
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}
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void ComputeStops(const bool isBuy, const double entry, double &sl, double &tp)
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{
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double slPts = InpFallbackSLPoints;
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double tpPts = InpFallbackTPPoints;
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if(InpUseAtrStops)
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{
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double atrPts = GetAtrPoints(InpSymbol, InpTimeframe, InpAtrPeriod);
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if(atrPts > 0.0)
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{
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slPts = MathMax(atrPts * InpSlAtrMult, 100.0);
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tpPts = MathMax(atrPts * InpTpAtrMult, 100.0);
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}
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}
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if(isBuy)
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{
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sl = entry - slPts * _Point;
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tp = entry + tpPts * _Point;
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}
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else
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{
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sl = entry + slPts * _Point;
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tp = entry - tpPts * _Point;
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}
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}
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int OnInit()
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{
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if(!SymbolSelect(InpSymbol, true))
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{
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Print("Failed to select symbol: ", InpSymbol);
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return(INIT_FAILED);
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}
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trade.SetDeviationInPoints(InpSlippagePoints);
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trade.SetExpertMagicNumber(InpMagic);
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return(INIT_SUCCEEDED);
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}
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void OnTick()
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{
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if(_Symbol != InpSymbol)
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return;
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if(!IsNewBar(InpSymbol, InpTimeframe))
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return;
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// Use closed candles (shift 1 and 2) to avoid intrabar repainting behavior.
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double o1 = iOpen(InpSymbol, InpTimeframe, 1);
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double c1 = iClose(InpSymbol, InpTimeframe, 1);
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double o2 = iOpen(InpSymbol, InpTimeframe, 2);
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double c2 = iClose(InpSymbol, InpTimeframe, 2);
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double e1 = GetEmaValue(InpSymbol, InpTimeframe, InpEmaPeriod, 1);
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double e2 = GetEmaValue(InpSymbol, InpTimeframe, InpEmaPeriod, 2);
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if(e1 == 0.0 || e2 == 0.0)
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return;
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bool bullishBody = (c1 > o1) && ((c1 - o1) / _Point >= InpBodyMinPoints);
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bool bearishBody = (o1 > c1) && ((o1 - c1) / _Point >= InpBodyMinPoints);
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bool crossedUp = (c2 <= e2 && c1 > e1);
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bool crossedDown = (c2 >= e2 && c1 < e1);
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bool longSignal = crossedUp && bullishBody;
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bool shortSignal = crossedDown && bearishBody;
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bool hasPos = SelectOwnPosition(InpSymbol, InpMagic);
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if(hasPos)
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{
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ENUM_POSITION_TYPE posType = (ENUM_POSITION_TYPE)PositionGetInteger(POSITION_TYPE);
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if((posType == POSITION_TYPE_BUY && shortSignal) ||
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(posType == POSITION_TYPE_SELL && longSignal))
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{
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trade.PositionClose(InpSymbol);
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hasPos = false;
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}
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}
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if(hasPos)
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return;
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MqlTick tick;
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if(!SymbolInfoTick(InpSymbol, tick))
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return;
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double sl = 0.0, tp = 0.0;
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if(longSignal)
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{
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ComputeStops(true, tick.ask, sl, tp);
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trade.Buy(InpLots, InpSymbol, tick.ask, sl, tp, "Simple EMA PA Cross");
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}
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else if(shortSignal)
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{
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ComputeStops(false, tick.bid, sl, tp);
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trade.Sell(InpLots, InpSymbol, tick.bid, sl, tp, "Simple EMA PA Cross");
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}
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}
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