Options are not suitable for all investors as the special risks inherent to options trading may expose investors to potentially rapid and substantial losses. Options trading subject to TD Ameritrade review and approval. Please read Characteristics and Risks of Standardized Options before investing in options. thinkorswim Alternatives and Similar Software ... thinkorswim thinkorswim is an advanced platform — and so much more. It's your entry into a holistic trading experience brought to you by TD Ameritrade.