Continuing from the perspective of buying a car:<p>If I put a sell order on the market at 12:00 the only impact is the sales price.  If it executes at 1PM or 2PM it makes zero difference to me as I can only access money at the end of the day.  So, I only gain liquidity if I would have been otherwise unable to sell by the end of the day.  Therefore, I don&#x27;t gain liquidity from HFT.