RE: A same scenario11 May 2026 09:38
I've surprisingly had a very quick response from LSE and I'll post it below.
"Thank you for your email. As we're not told by the Stock Exchange what is a buy or sell, we're forced to use an algorithm to work it out.
We calculate the trade type based on the trade price being higher or lower than the mid price at the time of the transaction. Sometimes this calculation does not work, or the price is the opposite side of the mid price. This means we are either unable to calculate what type of trade this is at all, or the calculation shows it as the wrong type of trade (a buy instead of a sell for example).
Unfortunately, it's a long standing issue as the Stock Exchange doesn't provide the correct information for trades, so any website like ours has to use an algorithm to determine what type of trade we're being sent. "
So, basically they know there is a problem but can't or won't do anything about it. A prominent disclaimer might help or stop classifying trades as buys or sells at all. Better still would be the correct information being transferred from the stock exchange.