Just commenting on the fact WeBull is showing trades (both buys and sells).
The T212 app just displays the ask (or can swap between bid and ask in CFD) and you’re just looking at one side.
T212 doesn’t have volume data it just has ticks which is how many times its changed within that period.
So to calculate the volume-weighted average price they need the data 
Bloomberg to my knowledge just gives them the ask/bid quotes.
I’ve complained a few times about it