Convert an indicator to EA

I have an indicator (XQ Forex Indicator) that i want to convert to ea . The indicator has aqua lines for buy and red lines for sell. So if the aqua lines appear it buys if the red lines appear it sells

(Trade closure)if a buy trade is open and a sell condition occur the buy trade should close and sell trade open, if a buy condition apears sell trade will close and buy apears etc after coding i should be given the source code.

Parameters 

Lot.

martingale distance.

(Martingale distance is the distance in point from open trade lets say it buys and maybe my martingale distance is 100 points it means that if the trade goes against me -100 it will add another position for me with the same lot size as selected in the lot option, if it goes -200 it will add another position,if it goes -300 it will add another position as long as it goes against it until the opposite condition which is a sell appears then it closes all trades of that pair and open new one in the current signal direction. If martingale distance is set to 0 it means it will not apply)