option traders, option participants, exchange member, membership, market maker, to make market, bid, bid price, ask, ask price, bid-ask spread, technical analysis, fundamental analysis, trading style, scalper, position trader, spreader, spread, floor, floor trader, floor broker, dealer, dual trading, broker-dealer, order book, order book official, limit orders, specialist, registered option trader, membership cost, trading stress, risk, trading mechanics, buy order, sell order, day order, GTC order, good-till-cancelled order, limit order, stop order, stop loss, stop-loss order, market order, all-or-none order, clearing house, margin, initial margin, maintenance margin, margin call, OCC = Options Clearing Corporation, margin liquidation, open interest, offsetting order, exercise, expiry, American option, European option, early exercise, exercise order, assignment, delivery, cash settlement, settlement price, automatic exercise, fees, trading fees, commission fees, settlement fees, regulation,