Brokers
TradeStation (broker) [ here ]
OptimusFutures [ here ]
Interactive Brokers [ here ]
Forums
TS Community [ here ]
App Stores
Trading App Store [ here ]
References
Books on TradeStation [ here ]; YT Channel [ here ]
Courses
Videos
Getting Started with TradeStation [ here ]
Programming Services
UsingEasyLanguage.com [ here ]
Johnson [ here ]