Advice required in Money management in EA coding
//++++ These are adjusted for 5 digit brokers. double pips2points, // slippage 3 pips 3=points 30=points pips2dbl; // Stoploss 15 pips 0.0015 0.00150 int Digits.pips; // DoubleToStr(dbl/pips2dbl, Digits.pips) int init(){ if (Digits == 5 || Digits == 3){ // Adjust for five (5) digit brokers. pips2dbl = Point*10; pips2points = 10; Digits.pips = 1; } else { pips2dbl = Point; pips2points = 1; Digits.pips = 0; } // OrderSend(... Slippage.Pips * pips2points, Bid - StopLossPips * pips2dbl
//+------------------------------------------------------------------+ //| Lot size computation. | //+------------------------------------------------------------------+ double LotSize(double SLpoints){ /*double TSSF.value, TEF.value; // Import from ComputeTSSF //double at.risk; // Export to init/start/OpenNew */ /* This function computes the lot size for a trade. * Explicit inputs are SL relative to bid/ask (E.G. SL=30*points,) * Implicit inputs are the MM mode, the MM multiplier, count currently * filled orders by all EA's vs this EA/pair/period count and history. * Implicit inputs are all used to reduce available balance the maximum * dollar risk allowed. StopLoss determines the maximum dollar risk possible * per lot. Lots=maxRisk/maxRiskPerLot **************************************************************************/ /*++++ Compute lot size based on account balance and MM mode*/{ double ab = AccountBalance(); switch(Money.Management.F0M1G2){ case MMMODE_FIXED: at.risk = Money.Management.Multiplier; break; case MMMODE_MODERATE: // See https://www.mql5.com/en/articles/1526 Fallacies, Part 1: Money // Management is Secondary and Not Very Important. // %used/trade= at.risk = MathSqrt(Money.Management.Multiplier * ab)/ab; // ~const rate. at.risk = MathSqrt(Money.Management.Multiplier * ab * MathPow( 1 - at.risk, OrdersTotal() )); break; case MMMODE_GEOMETRICAL: at.risk = Money.Management.Multiplier * ab * MathPow(1 - Money.Management.Multiplier, OrdersTotal()); break; } double maxLossPerLot = SLpoints * PointValuePerLot(), /* Number of lots wanted = at.risk / maxLossPerLot rounded/truncated to /* nearest lotStep size. /* /* However, the broker doesn't care about the at.risk/account balance. They /* care about margin. Margin used=lots used*marginPerLot and that must be /* less than free margin available. */ marginFree = AccountFreeMargin()*0.95, // Allow some slack marginPerLot = MarketInfo( Symbol(), MODE_MARGINREQUIRED ), // So I use, the lesser of either. size = MathMin(marginFree / marginPerLot, at.risk / maxLossPerLot); /*---- Compute lot size based on account balance and MM mode*/} /*++++ Combine TSSF and trade size*/{ double minLot = MarketInfo(Symbol(), MODE_MINLOT); if (size < minLot){ // Multiple orders -> no free margin // [risk=9.48USD/40.80, margin=10.62/1334.48, MMM=1x1, ExtraOO=0] // 0.23 0.007 Print( "LotSize(SL=", DoubleToStr(SLpoints/pips2dbl, Digits.pips), ")=", size, " [risk=", at.risk, AccountCurrency(), "/", maxLossPerLot, ", margin=", marginFree, "/", marginPerLot, ", MMM=", Money.Management.F0M1G2,"x", Money.Management.Multiplier, ", ExtraOO=", OrdersTotal(), "]" ); return(0.0); // Risk limit. } if (!TSSF.Enable01) double adjFactTSSF = 1; else adjFactTSSF = MathMin(1,(TSSF.value-1)/(TSSF.Max-1)); if (!TEF.Enable01) double adjFactTEF = 1; else adjFactTEF = MathMin(1,MathMax(0,TEF.value)); double LotStep = MarketInfo(Symbol(), MODE_LOTSTEP); size = MathMax( minLot , MathFloor(size*adjFactTSSF*adjFactTEF/ LotStep)*LotStep ); /*---- Combine TSSF and trade size*/} at.risk = size * maxLossPerLot; // Export for Comment return(size); } // LotSize double PointValuePerLot() { // Value in the account currency of a Point of Symbol. /* In tester I had a sale: open=1.35883 close=1.35736 (0.00147) * gain$=97.32/6.62 lots/147 points=$0.10/point or $1.00/pip. * IBFX demo/mini EURUSD TICKVALUE=0.1 MAXLOT=50 LOTSIZE=10,000 * IBFX demo/standard EURUSD TICKVALUE=1.0 MAXLOT=50 LOTSIZE=100,000 * $1.00/point or $10.00/pip. * * https://forum.mql4.com/33975 CB: MODE_TICKSIZE will usually return the * same value as MODE_POINT (or Point for the current symbol), however, an * example of where to use MODE_TICKSIZE would be as part of a ratio with * MODE_TICKVALUE when performing money management calculations which need * to take account of the pair and the account currency. The reason I use * this ratio is that although TV and TS may constantly be returned as * something like 7.00 and 0.00001 respectively, I've seen this * (intermittently) change to 14.00 and 0.00002 respectively (just example * tick values to illustrate). */ return( MarketInfo(Symbol(), MODE_TICKVALUE) / MarketInfo(Symbol(), MODE_TICKSIZE) ); // Not Point. }
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Hello friends this is checkmail and am trying to build an EA for Micro accounts that might start with an capital of $50 - $100.
Well i tried myself but couldn't arrive on a particular decision, so am seeking an expert advice in the code.
What am trying to explain in this post is how to code the minimum account freemargin() code for only $1 - $ 10 as minimum requirement.
As mostly micro accounts start with $25- $50, am trying to code the minimum margin requirement to trade for an EA.
Got any expert advice for it, also code example will be better.