Expert Advisor/Robot needed that works using bollinger. bands

I need mt5 trading robot Expert advisor that works on bollinger bands  with period 8 and standard deviation 0.5 .open a  buy trade when price closes above the upper band of bollinger bands with a stop loss below the 20 exponential moving average. close half the trade when price reenters closes inside   the bollinger bands. close the other half of the trade when price goes below the middle bollingerband .open a  sell trade when price closes below the lower band of bollinger bands with a stop loss above the 20 exponential moving average. close half the trade when price reenters  closes inside the bollinger bands. close the other half of the trade when price goes above the 8 exponential moving average . Advisor. should work on the multi timeframes. risk of each trade is 2%. Further details. of the other parameters to be discussed