CREATE TRADING BOT FOR EXISTING EA ON METATRADER 4 PRIMARILY BASED ON MOVING AVERAGES CROSS OVER

I  want a mt5 bot that tardes xauusd 0.01 lot on 100 usd standard account and on 200 usd account the lot size increases to 0.02 and I can adjust the lot size depending on my needs from 0.01 upto 1 standard lot.  The stretegy is very simple use 2 emas  . One is ema 6 and 2nd is ema 50 .  When the line of 6 ema cuts 50 ema  at upside then buy and close the buy position when the 6 ema cut the 50 ema at down side .Use only one position at a time .  The sell order when the 6 ema cuts the 50 ema at downside and close this short/sell position when the 6 ema cuts the 50 ema at upside .use only one position strictly .either it is a buy or a sell position.If the line cuts at either way it have to take position after the line cuts and the candle closes then on the opening of the very next candle it have to open position