I have use the indicator that I bought, It have ability to define the Liquidity profile,
it define use valume footprint or what else i dont know but i know how to use.
it seem like collect all valume:

- 8PM to 6AM of Newyork valume prepare for trand time 7AM to 9AM, Asia kill zone.
- 7AM to 12PM of Asia valume prepare for trand time 1PM to 3PM, London kill zone.
- 1PM to 6PM of London valume prepare for trand time 7PM to 9PM, Newyork kill zone.

they teach me call it liquidity profile.

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Volume Profile math