CLH - The Penny Pincher, page-10

From 4 to 4.10pm, it is Pre-CSPA, during that time, the buyer who is very keen to buy will put higher than the sell price, whereas the seller who is keen to sell will put at a lower price, the system then balance off based on the buy and sell price and volume. For this case, it is be the price of $1.02, and the buyer who put a higher price than $1.02 and seller who put a sell price of $1.02 or lower price will close the trade first and you became the surplus, hence didn’t get to buy.