Convert indicator to the new mql4 language

I want you to recreate the "murrey math black" indicator using the new mql4 language that uses OnCalculate.

Name the new indicator "batas"

And I ask for a code to get the value or price of 1/8, 2 / 8.3 / 8 and others, which will later be used on my expertadvisor.

like value1 / 8 = double iCustom (symbol, batas ........)

value2 / 8 = double iCustom (symbol, batas, ........)

The "murrey math black" indicator is on this page: https: //www.mql5.com/en/code/8570