I want to turn it to a robot.

Open a Buy and Sell order at the same time with same TP x pips and same SL x pips( I also use a indicator stop loss like MA).

Once one of the two open orders hit TP or SL, Immediately the other opened order's TP is modified. SL is still remain same or can be changed. Daynamic SL like ATR doesn't need change every bar.

I want to do it on every new bar, when my condition met.
Is it possible?

Also please explain how different lots are used.
For example, when a condition is met, more lots are used than the other trade lots. I want to do it on every new candle, when I open both trades at the same time.

Thanks in advance.

Set HEDGING for opening opposite positions at the same time.

When you want to change the TP of the other order immediately when an order exits, you need a trade function that checks if the other function is still open, and modifies the TP otherwise. Look for an example under "Trade Parameters".

For setting the trade size, read workshop 6 and the "Lots" page in the manual.

Thanks.

When I don't set HEDGING, a reverse order means exit?

For example is below. It doesn't have a exit order.

Yes, without HEDGING a short order automatically exits an open long position and vice versa.