Quote from Momento:
He would need more than 5k to trade the YM tho.
That's BS, at least technically.
CBOT-YM has got the lowest margin requirement of all mini-sized futures. If you're scalping the YM, all you need is a minimum of $1,500 per car.
If you aren't scalping, I'd recommend quite a bit more, not just since a 15-point drop would trigger a margin call on $1.5K margin (IB margin is $1.35K).
However, Momento's statement has some validity, because personally I wouldn't suggest such high margin.
$5K is indeed a good place to start trading 1 contract from, I generally use no less than $7.5K per car, often $10K/car margin (ES/NQ which is similar to YM), but then I guess I'm risk averse. It's up to you and your proficiency. Also, it makes a difference whether you're dealing more contracts. $2K margin on 1 contract - sure. But not so easy on 10+
If you use less margin than $5K - fine. But when the GLOBEX shuts down and you can't get out for 40 points (ES) or something else unexpected happens - as it does - the trading god loves Murphy's law by the way - Then I'll be the one who laughs last and best.
Slow and steady wins the race. Your main focus should be on living for another day. Always bear than in mind when margining.
Best is to calculate your risk model based on your stop rules;
Take your average stop+1/2 ticks and then divide that stop by the margin you're planning to use. If the result is more than 0.02 (2%) then you're getting in muddy waters. If a shutdown occurs and you're rushing through 30X your stop (the smaller your stops, the worse in this case!), you're losing 60% of your equity.
Just realize the mathematics of it. Logically, the smaller your stops / timeframe, the smaller the %risk per trade should also be! A lot of people get this wrong and think lower timeframe means less risk via time-risk distribution and beef up on the % risk per trade relative to their stops.
I would generally recommend to not risk more than 1%-1.5% on a single pos. I know plenty of ES traders who risk only 0.5% max.
2% is definitely heavy going on futures. You can make shit-loads, namely several ES/NQ points per day with any risk between 0.5-1.5%. If you can't - Don't trade. And particularly not such high risk.
Don't do anything stupid.
~Scientist