A Trading System Utilizing Support and Resistance in AFL

This strategy is designed around a breakout approach, generating buy/sell signals when the price crosses dynamic support/resistance levels. Support/resistance calculations rely on the highest high and lowest low values over a specified lookback period. This strategy performs well in trending markets.

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• Preferred Timeframe: Daily, Hourly
• Indicators Used: None
• Buy Condition: Price crosses above dynamic resistance.
• Sell Condition: Price crosses below dynamic support.
• Stop Loss: 2%
• Targets: No fixed target, Stop and reverse when AFL gives the opposite signal
• Position Size: 150 (fixed)
• Initial Equity: 200,000
• Brokerage: ₹50 per order
• Margin: 10%

AFL Code

				
					//------------------------------------------------------
//  Formula Name:    Support Resistance based Trading System
//  Website:         zerobrokerageclub.com
//-------------------
_SECTION_BEGIN("Dynamic Support Resistance");
SetTradeDelays( 1, 1, 1, 1 );
SetOption( "InitialEquity", 200000);
SetOption("FuturesMode" ,True);
SetOption("MinShares",1);
SetOption("CommissionMode",2);
SetOption("CommissionAmount",50);
SetOption("AccountMargin",10);
SetOption("RefreshWhenCompleted",True);
SetPositionSize(150,spsShares);
SetOption( "AllowPositionShrinking", True );
BuyPrice=Open;
SellPrice=Open;
ShortPrice=Open;
CoverPrice=Open;
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} – {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) ));
Plot( Close, "Price", colorWhite, styleCandle );
period=Optimize("Swing",3,1,25,1);
res=HHV(H,period); //resistance
sup=LLV(L,period); //support
DynamicPivot=IIf(ValueWhen(IIf(C>Ref(res,-1),1,IIf(C<Ref(sup,-1),-1,0))!=0,IIf(C>Ref(res,-1),1,IIf(C<Ref(sup,-1),-1,0)),1)==1,sup,res); 
//If current close breaks the resistance then dynamic pivot level would be last support, if close breaks the support then dynamic pivot level will be last resistance
Plot(DynamicPivot, "DynamicPivot", colorBlue, styleStaircase);
Buy = Cross(C,DynamicPivot) ;
Sell = Cross(DynamicPivot,C)  ;
Short = Sell;
Cover = Buy;
StopLoss=2;
ApplyStop(Type=0,Mode=1,Amount=StopLoss);
/* Plot Buy and Sell Signal Arrows */
PlotShapes(IIf(Buy, shapeSquare, shapeNone),colorGreen, 0, L, Offset=-40);
PlotShapes(IIf(Buy, shapeSquare, shapeNone),colorLime, 0,L, Offset=-50);
PlotShapes(IIf(Buy, shapeUpArrow, shapeNone),colorWhite, 0,L, Offset=-45);
PlotShapes(IIf(Cover, shapeSquare, shapeNone),colorGreen, 0, L, Offset=-40);
PlotShapes(IIf(Cover, shapeSquare, shapeNone),colorLime, 0,L, Offset=-50);
PlotShapes(IIf(Cover, shapeUpArrow, shapeNone),colorWhite, 0,L, Offset=-45);
PlotShapes(IIf(Sell, shapeSquare, shapeNone),colorRed, 0, H, Offset=40);
PlotShapes(IIf(Sell, shapeSquare, shapeNone),colorOrange, 0,H, Offset=50);
PlotShapes(IIf(Sell, shapeDownArrow, shapeNone),colorWhite, 0,H, Offset=-45);
PlotShapes(IIf(Short, shapeSquare, shapeNone),colorRed, 0, H, Offset=40);
PlotShapes(IIf(Short, shapeSquare, shapeNone),colorOrange, 0,H, Offset=50);
PlotShapes(IIf(Short, shapeDownArrow, shapeNone),colorWhite, 0,H, Offset=-45);
_SECTION_END();
				
			

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Download the detailed backtest report here.

Please note that you can expect even better results if you allow compounding of your returns.

Additional Amibroker settings for backtesting

Go to Symbol → Information, and specify the lot size and margin requirement. Below is a screenshot showing a lot size of 75 and a margin requirement of 10% for NSE Nifty:

Read Also: Boost Your Earnings: 10 Points Daily with NSE Nifty Investment