Ok...... So what do you advise?
I advise to start out trading ES in real-time and don't even consider CL as a new trader. The speed at which it moves with your real money = real emotions on the line will cause you to break down discipline in a hurry.
That, and CL can be a real chop monster in violent fashion for a day or two straight, which if you don't monitor you P&L balance while blindly "trading your system" you will soon have a day where the end result causes you to ship your pants.
If you cannot intraday-trade ES with a maximum -2.5 point (-$125) initial stop, your approach needs more work. You cannot consistently target $400 per contract trades in ES because that is often the entire day's range... or more. I think you might have meant your ratio scale of profit to stop is relative to CL in that prior statement but if not, you'll never make consistent $400 per-contract trade profit exits in ES day trades over time.
If you cannot be net profitable in ES with $5,000 or $10,000 initial then you will fail with $50,000 or $100,000 or $1,000,000 balance. The idea that a large account = success is logical but wrong. You won't "figure things out" before you bust a large account... you will invariably start losing, place larger bet sizes to win it back, pull stops to avoid more losses, average down as trades are losing until you puke out one huge loss. Etc.
The fallacy that account size = success rate is wrong. Dead wrong, and lots of six and seven-figures blown accounts out there can attest to it. You either have all your ducks in a row or you do not, and account balance size has less than nothing to do with that fact.
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Start with ES or NQ or TF. Monitor your daily P&L like a hawk. Have a daily max-loss shutdown limit and honor it. If you are down -$600 from four straight losses, either the market sucks that day or your execution sucks. And it doesn't matter which because something sucks and you are losing money. So stop trading, walk away from the screens, analyze the situation post-market when your head is cleared and objective.
Those are a few realities of day-trading.