Bollinger Band EA

i want to trade a trading system based on the bollinger band, I want to sell the upper band and buy the lower. I have tested this system on Tradestation in easylanguage code.

I want that all the trade are closed using the stop loss trailing stop or reverse order based on pips quantity, no one order must be closed or reversed by a new bollinger band signal.

please note that mql and easylanguage work different about the trailing stop, I want that when the trailing level is reached then a stop order is placed using a percentage of the gain reached.

Look at this example:

buy at 1,3030  trailing stop in pips 0,0030 percentage 10%, then if the price 1,3060 is reached an exit stop orde must be pacee at 1,3057. ( 1,3060 - 10% of 30 pips gain = 1,3060 - 3 = 1,3057 )  if the price rise up then the stop order must be correctly updated

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