I don't know about tradestation, but on TradingView there were like 20 feeds for BTCUSD price last time I searched "BTC". All the exchange providers you can think of plus some that I didn't recognize. Try opening COINBASE and RobinHood at the same time and check the BTC bid/ask on each at a single moment in time. It's probably been 6 months since I've done it, but back then there was more than a percent difference in the bid/ask between exchanges (RobinHood has zero commissions, but it's not inexpensive...quite the opposite). 

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