@l-andorrà thank you

I already have placed the pending order on Lots size let's say 0.01.
and I want that pending order change lots size to 0.02.

Any one please suggest.

PS. It would better not delete the old pending order and place pending order again.

Thank you

@ambrogio OK, I will try forward test in demo what will happened.

That means, the execution of blocks start at the beginning of the new bar. Am I correct?

When I use "Once per bar", it is executed in the middle of bar.
Any way I can execute the blocks at the completed bar to get exact value of high low open close candle id 0 ?