Some people like IB's policy on auto-liquidation, but I think it's disgusting and not worth the risk of getting screwed by it. I guess it's a relatively cheap lesson for you to learn, but what happened to you was exactly what happened during the flash crash. This means IB is not and will not change how their auto-liquidation works.
Basically have 3 choices. Continue with IB but with less leverage to mitigate the liquidation risk, trade the same and accept that risk, or find a new broker that uses an actual person for liquidations.
Basically have 3 choices. Continue with IB but with less leverage to mitigate the liquidation risk, trade the same and accept that risk, or find a new broker that uses an actual person for liquidations.