RE: SP2 Oct 2019 21:20
Brocal
Imagine a livestock sheep market, rather than a share stock market. It's full of farmers wanting to buy and sell sheep. Farmer Giles runs his pedigree ram into the ring and the auctioneer (market maker) looks for bids. Once he thinks he has the best bid from Farmer Jones, he looks at Farmer Giles to see if it meets the current offer in his mind. If so, the hammer goes down and there is a trade; is that a buy or a sell? Neither, it is a trade.
What this buy/sell trade algo nonsense suggests is that if the hammer goes down below Farmer Giles' early expectation as he walks into the sale ring, it is a sell; and if the hammer goes down above his expectations it's a buy. That is all borlocks because the ram has changed owners through a market trade.
If the average trade price for sheep goes down it is bad for farmers. If it goes up it's good for farmers. It is pointless trying to figure out whether each trade is a buy or a sell, because it is both. The only thing that matters is the price direction.