what happened to a trade of mineI put in an order to buy a stock which was also thinly traded like PSE for 10,000 shares.
my order was not 1st in line, someone had an order for the same price different amount in front of me.
We were both filled at the open for 500 shares each.
I called during trading hours and I was told it was the mm making a market and they can fill trades that way. So I was forced to buy more at the ask so that it would not be a totally ridiculous trade.
It seems they can do what they want. So your damned if you put in an all or none and damned if you don't.