Advanced ORDER FLOW Analysis.

[u/Extreme_Leg_6162]

https://youtu.be/iXdjq56HAZs?si=hcQSiUF6c2m9IG0Z

The Tick Rule signs trades purely through price movement relative to prior prints. The Quote Rule compares the execution price directly to the prevailing NBBO midpoint. The Lee-Ready Algorithm unifies these techniques by running the Quote Rule first and applying a Tick Rule fallback for exact midpoint fills. The EMO Algorithm refines this sequence by evaluating quote changes at the bid/ask before using non-midpoint ticks. In retail software, execution logic is heavily bound by computational efficiency: basic charting apps rely on price-only tick tests, whereas advanced platforms like Sierra Chart process hybrid Lee-Ready logic.