Partial Close Ea with a Grid System on same pair with a little implementation of Martingale

Hello everyone, I would like to ask for a MT4 Platform an Ea that work in this way.I'm also using a Raw Accont for lower spread and predefinied commision.

So I  would like the ea to work in this way :

Open at example ( on a predetermined lots, better in decimal because I use Renko Charts block 10,20,30,40,etc...) on a GBP/USD 1.2460 one Buy position at 1.00 Lots and at the same times one Sell 0.50 Lot ( let's say that the Renko brick is 20).

So if the position goes up of 20 pips ( profit take to choose, like in this case 20 pips) the ea will close the 1.00 buy lots position and the sell 0.50 lots.

If the position goes down of 40 pips ( the double down of the 20 points brick) the buy position will be Partially Closed to 0,76 and Sell position will increase to 1,52.

The take profit will be the same bur for the Sell position ( + 20 pips) and when the price will reach 20 sell es: from 1.2420 to 1.2400 the buy position (0,76) and the sell position (1,52) will be closed, now having a little lose .

If the position re-trace and will go now up of 40 pips, the ea will reduce the long position to 1,14( PERCENTAGE tha I CAN CHOOSE of 25 or more) with a profit target of +20 pips and the sell position will be half the long position so 0,57.

The process will continue till We will take a profit or a little lose.

So I would like to have the ea every "re-bounce" of the brick to open and close partial of the trade in which is the direction and to take total full profit form the opposite position ( that is generally the half). It's like an hedging but with lots that will be sometimes becomes slower of a PERCENTAGE tha I CAN CHOOSE or  with sometimes a martingale beetween( with an option for choosing too).

Of course I can explain more if u didn't understand well, thank you very much.