Metric for estimation smoothness Equity

Dear collegs,
could you recommend with what metric estimate smoothness equity in backtest?

Best regards,

@axweye you might consider something like the K-Ratio discussed here,

Or maybe take an R-Squared (coefficient of determination) of your Equity curve.

Thx a lot!
I've found one more interesting article

@axweye a couple of sample afl codes for doing that.