Hi, what is the formula behind the up/down trend line as shown on the "Change of Total Won/Lost over time" graph. It looks like it could be an Exponential Moving Average (EMA) but if I try to model the same in excel using the same bets taken from X-Feeder statement I don't get the same result.

I tried : EMA = alpha*balance + (1-alpha) * previous EMA

where alpha (damping constant) is any value from >0, <1