""The sales of the January 420s on Monday was pretty interesting. This is one THIN Market. I sold 15 covered calls - one at a time throughout the day. I know nothing about options pricing - I just placed bids high enough to have them not execute and then lowered my ask by a nickel at a time until I got an immediate hit. For about half of the sales I felt like there was a computer on the other side as my sales were quite a bit above the bid shown - I got the same execution price on 5 sales in a row."" Goog morning, there is a lot to unpack here. Do you pay commissions? How much does it cost to sell one option at a time ? You went high bid for one contract and low offer for one contract to tighten the market, hoping your offer would be taken? Did you play, market maker for a day? Thanks.