There is a block called "Hours filter" which have less setting, but I think it will be easy to understand it. Backtest these blocks with "Draw arrow" block. In other words - Hours filter -> Draw arrow. If you add Once per bar just after Hours filter, this will give you 1 signal, otherwise the block will pass at every tick in the whole period of time.
Trailing stop has settings like:
Trailing stop - the size (in pips) where to put the SL
Trailing step - how often to make moves. If step is 10 pips, it will move SL in every 10 pips of profit. If it is 0, it will move it in every price that is bigger than SL+TrailingStop.
Trailing start parameter - when to start trailing stop functionality. You can put 10 pips here, and until you have 10 pips in profit, Trailing stop will not work, no matter what are the settings.
For you, I think the settings are:
Stop - 20
Step - 10
Start - 10
This can explain how trailing stop actually works. Here we have the same trailing stop functionality on the left and on the right. Well, without taking care of Start option. http://fxdreema.com/demo/mt4-9975