Better than the web on desktop, for options – thinkorswim: Trade. Invest. Review

2020 October Update More stable this year, and very fast on iPhone SE (2020) The THEO theoretical price for option legs just disappeared on Oct 14, please add it back ! Legacy comments on old versions: 2017 October update: Customization of what columns to show and in what order to show them in is great, and is available for ticker symbol watchlist, portfolio positions, and entered (open or filled or cancelled) orders screens. It asks me for my password a lot more often, it should use touchID more often. 2017 July update: -1 star for nagging me to write a review and popping up reminders to write a review while the market is open. After demerits for review whoring, TD/ThinkOrSwim still earns a strong four star rating from me, a long term customer and option trader. ToS and TDAmeritrade understands what option traders do, and makes it easy to do. Recent editions have been weak about populating a market 'mark' price quote into lists of open orders. This missing the mark problem continues in 2017 June. Thoughtful improvements, but the additional information is optional and my screen does not become increasingly cluttered with additional columns I do not use, as I can sort or hide info I do not use. Flexible customizations. Sometimes unable to connect when the market is busy. The latest improvements to chat with support and share screens or images/screenshots is great.
Review by TimesReader2011 on thinkorswim: Trade. Invest..