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58 lines
2.5 KiB
Plaintext
58 lines
2.5 KiB
Plaintext
//+------------------------------------------------------------------+
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//| LotSizeCal.mqh |
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//| Copyright 2021, Nkondog Anselme Venceslas |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2021, Nkondog Anselme Venceslas"
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#property link "https://www.mql5.com"
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//Lot Size Calculator
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void LotSizeCalculate(double SL=0)
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{
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//If the position size is dynamic
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if(InpRiskDefaultSize==RISK_DEFAULT_AUTO)
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{
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//If the stop loss is not zero then calculate the lot size
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if(SL!=0)
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{
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double RiskBaseAmount=0;
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double RiskBase=0;
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//TickValue is the value of the individual price increment for 1 lot of the instrument, expressed in the account currenty
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double TickValue=SymbolInfoDouble(gSymbol,SYMBOL_TRADE_TICK_VALUE);
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//Define the base for the risk calculation depending on the parameter chosen
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if(RiskBase==RISK_BASE_BALANCE)
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RiskBaseAmount=AccountInfoDouble(ACCOUNT_BALANCE);
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if(RiskBase==RISK_BASE_EQUITY)
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RiskBaseAmount=AccountInfoDouble(ACCOUNT_EQUITY);
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if(RiskBase==RISK_BASE_FREEMARGIN)
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RiskBaseAmount=AccountInfoDouble(ACCOUNT_FREEMARGIN);
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//Calculate the Position Size
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LotSize=((RiskBaseAmount*InpMaxRiskPerTrade/100)/(SL*TickValue));
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}
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//If the stop loss is zero then the lot size is the default one
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if(SL==0)
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{
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LotSize=InpDefaultLotSize;
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}
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}
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//Normalize the Lot Size to satisfy the allowed lot increment and minimum and maximum position size
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LotSize=MathFloor(LotSize/SymbolInfoDouble(gSymbol,SYMBOL_VOLUME_STEP))*SymbolInfoDouble(gSymbol,SYMBOL_VOLUME_STEP);
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//Limit the lot size in case it is greater than the maximum allowed by the user
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if(LotSize>InpMaxLotSize)
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LotSize=InpMaxLotSize;
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//Limit the lot size in case it is greater than the maximum allowed by the broker
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if(LotSize>SymbolInfoDouble(gSymbol,SYMBOL_VOLUME_MAX))
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LotSize=SymbolInfoDouble(gSymbol,SYMBOL_VOLUME_MAX);
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Print("Lot ", LotSize, " Max lot ", SymbolInfoDouble(gSymbol,SYMBOL_VOLUME_MAX));
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//If the lot size is too small then set it to 0 and don't trade
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if(LotSize<InpMinLotSize || LotSize < SymbolInfoDouble(gSymbol,SYMBOL_VOLUME_MIN))
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{
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LotSize=0;
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Print("Lot size too small : ", LotSize);
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}
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}
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