Suppose I enter a pending order in the current bar.
Then my questions is, in the next bar, the condition checking for the pending order will be done before the body of the script, or after?

The behaviour of pending orders could be covered better in the manual.
Zorro is not putting a pending order as we would expect it from manual trading.

I also do have a lot of questions regarding pending orders.
Important would be to know how the tool handles orders in general, specificly in a portfolio loop (sequential and waiting for confirmation, or just fire all orders within the loop, collect the confirmation after, and maybe if no trade open, fire again?)

Basically blocking vs. non-blocking design?

>>in the next bar, the condition checking for the pending order will be done before the body of the script, or after?

Before. Limit checking follows the same behavior as TMFs.

Thanks a lot jcl for the information.

Yes, full of "unknowns", and that is why it is exciting to explore :-)