Grid-martingale ea modifications: +hedge function

I have a grid ea, 

and I would like to modify it with just a simple plus function:

I want to use it buy and sell directions at once, at the same time on one symbol!

(buy and sell positions are independently each other) 

I can test it in that way: I  attached the ea on 2 instances of eurusd:

at one I set the expert properties /Common settings "Only Long"

and at the other I set it "Only Short" 

but this is just a forward test with slowly live datas... 

I would like to run it with backtest, and live demo, too, on one chart..

the main working method:

if the price goes down 20pip (=gap) then buy 1lot, and if the price 

goes ,more 20 pip  deeper then buy again 1x2=2lot, and so on..

but if at the start the price goes again us, now for example goes up 

40pip (=opposite-gap), then buy 1 lot, and if it goes up towards 20 

pip again, then sell 1x2=2, and if it up again 20pip, then sell again 

2x2=4 and so on..

there isnot stops. nor takeprofits.

if the prices goes the good direction, and it start to make profit:

for example we have a long, and the price goes up any pip, then we 

trail the profitable side with an atr base indicator, but only if the position(s) is in positive 

profit! ..it trails only the positive side.