I trade only ETFs, and sometimes stocks, NOT futures. To have a margin call your positions would have to drop almost 50%. 50% is an extreme loss, even for my DDMs (2X Dow Jones).
I've never had a margin call either as I ensure I'm adequately capitalized. I suppose if you've got the available funds invested elsewhere, a margin call is just a nuisance. But I'm using IB for trading and they don't do margin calls. Instead you just hear "ding" for an execution and see that they've liquidated one of your positions.
I learned that IB's Margin Liquidator program works pretty well. It's giving me a PF of better than 2.5, for EOD closeuts (long and short).
Yes, for me the Windows error sound (boink) now triggers a visceral reaction since means I am out... good, bad or indifferent. :eek: