No, absolutely not. Those are assumptions that if the trade was on the bid it was a sell and if the trade was on the ask it is a buy - here is Ihubs explanation of their trades tool:
The 'Buy', 'Sell' and '?' columns - Where the 'Price' is closest to the 'Offer' price, the trade is considered a 'Buy'. Where it is closest to the 'Bid' price, the trade is considered to be a 'Sell'. Where it is dead centre between 'Bid' and 'Offer', it appears in the '?' column; this indicates that the trade cannot be identified as either a 'Buy' or a 'Sell'.
Note the terminology they use: considered
I am not a fan of that tool. I can't tell you how many times I would sell something on the ask. It would sell in partials and I would see people on Ihub yelling "buys are coming through" and I laugh because I know they were sells. Also the same thing for buying at the bid. There is a certain board here and I won't name it where they have no clue about buying on the bid and think every time there is a print there it represents a sell.
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