How to use function from 1 jupyter notebook in another jupyter notebook?

Please carefully answer the question after understanding the context:

Context: There are two python notebooks: first is "trading.ipynb" and second is "monitorTrades.ipynb". Now, while execution of main block in the first notebook a function has to be executed in the second notebook. Also this function has to be passed with 2 arguments which are calculated during the execution in first notebook. Also there are multiple functions in monitorTrades.ipynb, but I want to only run function 'checkFunc()' which is present in monitorTrades.ipynb. This function has 4 arguments, 2 arguments are in the monitorTrades.ipynb and 2 arguments are calculated during the execution of trading.ipynb.

The function must execute on monitorTrades.ipynb.

How to do this implement this?

Thanks for your answers.