Removed date limit usage

Improved trailing stop function to be adaptive to current spread
Added a function to remove all trades every day at 20+gmt (to avoid high spread)
Extended expiration to august

New version with improved settings , reccomended low spread or ecn account.

1) Easy to backtest
2) Improved settings , DD -50% PF -20%
3) Changed order type, from instant order to pending order (better perfomance with news)

1) Improved profit factor +15% with same drawdown and number of trades
2) Extended expiring date 2019/05/01

Added broker_gmt parameter.