Best Picks The Best Online Stock Trading Brokers of 2017 We have reviewed this category for 10 years. Options contracts are essentially the price probabilities of future events. The more likely something is to occur, the more expensive an option would be that profits from that event. OptionsHouse will continue to be operated as a separate brokerage, with no change to the platform, pricing or accounts. Any future changes that arise due to this acquisition will be reflected in the next update to our stock trading ohline More.