Forex Expert Advisor base on Fractal Breakout which mean if the trend is downtrend, the EA will put the Pending Order on every fractal form. The lot size for each pending order /fractal form can be pre determine. OR spesifically the lot size and Take Profit can be pre determine at the Expert Advisor Properties box. ( I will give the example of FRactal EA)
The trailing stoploss is using PSAR ( this file will be given to you to merge with the fractal EA).