Algorithmic Martingale Opposite Order EA

I need to put in my strategy martingale system. It is a hedging strategy with two opened orders at same time,allways in settable distance.It starts with Sell 0.01 and Buy 0,01,when market goes up,next pair of positions should be Sell 0,02 and Buy 0,01,if market turns down,next pair of positions should be Buy 0,04 and Sell 0,02 and go on. If the market continues down,next positions stay same: Buy 0,04 and Sell 0,02 till the market turns against the trend