Quote from bronks:
Holey-Moley. I've got 500 dollar margins and at times, I will go all in with max margin and usually average about 40 - 60% of margin available... and no, my equity swings are not that dramatic. But it does throw a Steve T-Var's type consistency out the window.
I've seen the ES drop several points in a matter of seconds. At $500 per contract, more than half of that could be gone just like that. And stops might not matter, as one could filled right at the bottom.
I cannot fathom any reasonable trader supporting one ES contract with anything less than 10K (I would personally go much higher). I am not worried about what I can control, but with what I can't:
What if the brokerage you were trading with had an outage, and you could not trade for minutes, even hours?
What if Globex went down? The stocks supporting the index would still trade--the index itself might not (at least on the platform you're used to). In the time it could take you to telephone your broker to get you out with floor-traded products, your account could be in freefall.
What if the power went out in your neighborhood? Minutes, even hours, with no electricity (and, darn it, the laptop battery needs recharging!).
What if the cable company is employing some putz who just cut off the entire neighborhood from cable internet access. For twenty-four hours.
All of these things have happened, to me or to others I know.
