What is the Adaptive Moving Average formula used in iama()?

 
Good morning
Does anyone know what the formula is used by MQL5?
I can't find and there are no formulas missing on Google... I wouldn't want to try them all before coming across them by chance

THANKS
 
Thank you for your answer
Unfortunately, I had already found this code and I think that the formula is not good because when you add it to a graph, the AMA of the terminal and this AMA() code, the plots do not merge.

If anyone else has a code or the formula, I would be happy to
THANKS
 

The default setup for AMA in the link William shared is Open Price while the version with terminal is set to Close Price by default. I tested and they are exact same thing.

 
Good morning
THANKS
I will do a test again to see a little later if I have the same thing on my side