Hi all!

I am seeking to figure out how to generate the .t8 data following the article here. https://financial-hacker.com/algorithmic-options-trading/
I downloaded the scripts that he is using for this, but for some reason im getting a syntax error on yield(). This script itself is as it arrived and includes the "#include <contract.c>". Any ideas on why I am getting the following response or how I can debug it?

syntax error
< var Interest = 0.01*yield(); >

Thanks!