"do you agree with his comment and my assumption that the atm issue is causing the 'account not loaded' issue wherein you completely lose control of the account"
No, I do not see it related. The fact that no ATM orders are submitted when disconnected does not cause the 'account not loaded' error message. It seems MBTrading refers to a different known issue with MBTrading. We receive position updates before execution updates from MBTrading. If you use automated NinjaScript strategies (not ATM strategies), it can mess up position tracking. NinjaTrader relies on execution updates to be received first.
"this is the problem...you can not leave an ATM running and risk a disconnect (such as overnight while you are sleeping)"
We do not recommend to trade unattended at all. Since it is electronics, there is no telling what might happen when not monitoring your trading. Please note that I refer to the fill of the entry order which will submit ATM orders, I am not referring to running an ATM strategy. If NInjaTrader is not connected during the fill of the entry order, NinjaTrader will not receive a signal that the entry order is filled, so it will not trigger ATM orders either.
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