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> or because no one was empowered to pull the kill switch because of the opportunity cost (perhaps pulling the switch at the wrong time costs $500k in opportunity).

Isn't the problem that pulling the plug on a trading bot doesn't just have opportunity costs, but may also leave you with open positions that, depending on the kind of trades you're doing and the way the market is moving, could be arbitrarily expensive to unwind?



You usually have a procedure to close out open positions via an alternate system (including via phone).


Can be two buttons, one for buying and one for selling




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