A simple EA based on stochastics and EMA that i need to modify

i have a simple EA based on stochastics and EMA that i need to modify. simply put my robot works when by the stochastics  triggering the trade while the ema determines direction. the EMA is a 200/80 cross ema to determing the direction of the market. then a stochastics arrow indicator triggers the buys and sells in the direction of the ema. the EA  picks only a specified number of trades. the only addition to what already exist is to modify My ea so that it can break even and also add a percentage per trade  The type of break even I want is a negative break even meaning when market goes against me and comes back up it will break even.I already have a negative stop on my ea but it's not working well  I also want to be able to write a percentage I want the ea to risk per trade meaning if I say 5% for instance.  It will risk 5% of my equity only . secondly, In addition the ea should have a mode 2 where the direction is triggered only by the 80ema. Above it only buys below it only sells. So it has two modes. Mode 1 is my normal system while mode two the direction trigger is no more the 80/200 cross but only the 80 ema.