Please help me understand how to use global variables

[ichabod801]

And that's a great example of why not to use global. Your global statement is still in the conditional, so the variable is only global if row is 2.

Here's how to fix it. First, delete line 22. Then change line 15 to:

prev_entry_price, prev_exit_price = setup_eoddata(row, sym_open_cell, entry_price_cell, prev_entry_price, exit_price_cell, prev_exit_price)