Bookmap Volume Bubbles?

Does anyone know how to write a script that would calculate aggressive buying and selling (market orders) and show this as the Bookmap Volume Bubbles (Blue/green or red)? Also, the size of the bubbles would indicate how big those orders are, relative to others.
That would be really helpful, because it would allow us to see the big volume players, especially around support & resistance levels.
thank you in advance for your help.
 

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