The Expert Advisor trades by signals obtained with the Bollinger indicator.

Volume of a current trade depends on results of previous trades.

The EA provides:

1. limitation of maximum volume of trades;
2. initial lot volume;
3. value of Trailing Stop; 

Parameters:

1. Lot - initial volume of a trade.
2. ValueTrailingStop - value of stop loss order in points according to a current price.
   
3. deltaLots - ratio of the next trade volume increment if the previous one was unprofitable.
4. QuantityOfPoints - minimum value of crossing the Bollinger indicator's lines by the price to open a trade.
5. MaxLot - maximum allowable trade volume.

The EA's parameters are optimized for trading on EURUSD, H1.