这句话在 Pine-Script V3 中是什么意思？

Question

the sentence is:

catr(_m) => (cum(tr)/(n+1))*_m

I am seeking to transfer this sentence to Pine-Script V5. No idea of what _m and n means here, and how to transfer them into V5 syntax? They both appear only in this sentence.

Answer 1

n is renamed as bar_index in v4 and above. So, it's the index of the current bar.

_m is just a parameter name.