CC-13 - nested obv

[sjason19]

[sjason19]

When calculate_obv() is called multiple times on iteration, PHP complains that obv() cannot be redefined because it was already defined. I think we have to take out the nested function and define each function separately.

Fatal error: Cannot redeclare obv() (previously declared in /User/GitHub/crypto-currency-manual-trader-bot/lib/obv.php:13) in /User/GitHub/crypto-currency-manual-trader-bot/lib/obv.php on line 13