OK so I just started a trial for a footprint chart through Fin-Alg on Ninjatrader (Zen-Fire feed). Does anyone have any experience with the reliability of Zen-Fire's tick data? I mean I know they're a fast feed execution etc. but how is their tick data? Maybe I'm just too new at footprint charts but at the end of an uptrend as the Market (ES) is reversing the Cum. Delta continues to increase as the Market steadily declines. This seems odd to me.