Set buy quantity based the open of the day buy executes

[saaqibz]

Hello,

I'd like to make a strategy where the buy operation will buy a certain amount based on the open price on the day it executes.
I know buy executes the following day so but the setttings in next() are for the current day where the signal is picked up.

Is there a way to get information from the next day to set the buy's position? Maybe there's a way to alter an existing trade to hack it?

Thanks in advance for reviewing my question!