The zero lag exponential moving average (ZLEMA) indicator was created by John Ehlers and Ric Way. The idea is do a regular exponential moving average (EMA) calculation but on a de-lagged data instead of doing it on the regular data. Data is de-lagged by removing the data from "lag" days ago thus removing (or attempting to) the cumulative effect of the moving average.
zlma [-l N_LENGTH] [-o N_OFFSET]
|n_length||-l --length||Window lengths. Multiple values indicated as comma separated values.||20||True||None|
|n_offset||-o --offset||offset||0||True||range(0, 100)|