All Sells No Buys4 Jun 2020 10:48
In my opinion, the most likely scenario is "sell" deals placed with market maker and left on the books until a buyer is sourced. Whenever someone "buys" some shares, these orders will be filled with previously placed sell orders. For example, the MM has 1,000,000 shares in his open "sell" orders. Someone then comes along and buys 100,000 and to the buyer this looks like a "buy" trade. However because it is fulfilled from the existing 1,000,000 "sell" order, it shows as a sell. Conversely if someone tries to buy 100,000 and there are no sell orders in place, the MM will fulfil, (if it's not fill or kill order) from the next sell order received from the share. This will show as a "buy".
I could place a sell order today but for a price of 1.50p, but as the live price is 1.28p, it is unlikely to settle, however, it can remain on the books for some time and if the share price rises in future, it may well be fulfilled by someone willing to pay 1.50p. This buyer would see his purchase listed as a sell as my sell deal was placed first.
Hope this helps....