Hi,

Suppose I have both IB & Tradier account, can I use these 2 brokerages at the same time?

My guess is it's not currently supported: in 

Lean/Launcher/config.jsonhttps://github.com/QuantConnect/Lean/blob/master/Launcher/config.json

"environment": "backtesting", // "live-paper", "backtesting", "live-interactive", "live-interactive-iqfeed" 

looks like environment can only be set to one single value.

But I think it will be nice to be able to use these 2 brokerages at the same time in the live sessions.

1) sometimes a brokerage may go down during trading hours; then we can have the other account to continue trade.

2) the data feed of one brokerage may have delay at certain point during the day, we can use the lastest data feed from the other account.

Thoughts? shall I log a feature request in github?

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