Two independent trading systems using indicators SilverTrend_V2 and ColorJFatl_Digit within one EA, with an option of changing the size of the future trade depending on the results of the previous ones for this trading system. Signals to open trades by trading systems are formed when a bar is closing, if the trend has changed, displayed through changing the color of any of those two indicators.
To manage the volumes of the positions to be opened, the blocks of the EA inputs were added. For example, in the system using indicator SilverTrend:
input uint    A_BuyLossMMTriger=2;  //A number of losing Buy positions to reduce MM input uint    A_SellLossMMTriger=2; //A number of losing Sell positions to reduce MM input double  A_SmallMM=0.01;      //A Share of the deposit in a deal, when losing input double  A_MM=0.1;            //A Share of the deposit in a deal for normal trading
With such inputs and if there are two last trades within the same trading direction, the EA will open the next trade in the same direction with the lot size of as little as 0.01. Should at least one of two last trades be non-losing, then the position volume will be 0.1.
Inputs for the trading system using ColorJFatl_Digit are absolutely the same:
input uint    B_BuyLossMMTriger=2;  //B number of losing Buy positions to reduce MM input uint    B_SellLossMMTriger=2; //B number of losing Sell positions to reduce MM input double  B_SmallMM=0.01;      //B Share of the deposit in a deal, when losing input double  B_MM=0.01;      //B Share of the deposit in a deal, when losing
For the generated EA to operate correctly, the compiled files of indicators SilverTrend.ex5 and ColorJFatl_Digit.ex5 must be in the <terminal_data_directory>\MQL5\Indicators folder.
In testing shown below, the EA’s default inputs were used with stops.
Fig 1. Exemplary trades in the chart
Testing results for GBPUSD H6 over the year 2016:
Fig. 2. Testing results chart