Asking such a question indicates you're lack of knowledge about what you might be getting into, and nobody has clued you in. So....
1. When you trade 1 ES contract, you're putting into play ~ $170,000. The exchange requirement for maintenance margin is currently $12,000. That's what you must post to hold a trade overnight. You are 100% responsible and accountable for whatever happens while you hold that $170k contract! If you wipe out your posted margin, you're responsible to the broker for any deficit until the contract is closed.
2. Some brokers will let you day trade with $500 in margin money, but that means you have only "10 points" of cushion before that margin is wiped out. 10 or more points can occur quickly, as you hopefully already know.
3. There is a Micro ES contract at 1/10 the size of the Emini ES... IOW, a face amount of $17,000.
Now you know.