I hadn't used MakerDAO up until recently (about 2 weeks ago) which was right after the Black Thursday events.

I opened a vault, collateralized ~19 ETH and decided to do a test run of how the system worked.

Personally, I see the risk there if the vault gets liquidated in another BT-like event. I wonder if they could add more solutions for vault owners to stay ahead of this risk (maybe something like this already exists in the form of private scripts, etc.) --- I would love to be able to have a set price drop in x time frame that refilled my vault to recollateralize in the event of a flash crash to avoid liquidation.

I'm not sure how the liquidations look, maybe you know more than I do and could educate me -- does your vault get immediately liquidated if it reaches the liquidation price or do you have time to refill your vault with more collateral before it's liquidated?