How Many Trading Days to Pass an Eval? The Days-to-Fund Math
Before I spend a dollar on a prop firm eval, I want two numbers: how many trading days my setup realistically needs to reach the profit target, and how likely it is to trip the drawdown limit on the way. Most traders buy the eval first and discover those numbers the expensive way. The math isn't hard — it's just uncomfortable, which is why nobody runs it. Let's run it.
What's the naive math — and why does it lie?
The version everyone does in their head: target ÷ average daily profit = days to fund. A $3,000 target with a strategy averaging $150/day says twenty days. Simple.
It lies for two reasons. First, averages hide the sequence. That $150/day average was built from $500 days, $30 days, and –$400 days in some order — and on a prop account, order is everything, because a drawdown limit doesn't care about your average. It cares about your worst stretch arriving before your best one.
Second, the drawdown limit is the real boss. An eval isn't "reach the target"; it's "reach the target without ever touching the loss limit." The right question isn't how fast is my strategy — it's does my worst realistic losing streak fit inside this firm's drawdown with room to spare? Speed is the second question.
What numbers do you actually need?
From your backtest (this is where an honest Strategy Analyzer read pays off):
- Average per day and per month — the speed estimate.
- Max drawdown — your historical worst peak-to-trough. Compare it to the firm's limit: if your backtested max drawdown is most of the firm's allowance, you're betting the eval on history never getting worse. History gets worse.
- Worst single days — the "would I survive that day on this account?" list. I built a 10-worst-days table into my analyzer precisely because this is the list that decides evals.
- Trades per day — sanity-checks whether your timeline even fits how often the strategy fires. A rare-fire strategy might be wonderfully safe and still too slow for an eval's rhythm.
How does contract sizing change the math?
Linearly, in both directions — that's the trap and the tool. Double the contracts and you halve the days-to-fund and double every drawdown number at the same time. Since the drawdown limit is fixed, sizing up eats your survival margin exactly as fast as it buys speed.
My approach is to find the size where the max drawdown sits comfortably inside the firm's limit — half of it is comfortable — and accept whatever days-to-fund that size implies. If the implied timeline is unacceptable at survivable size, the answer isn't more contracts; it's a better strategy mix or a different account tier.
Why run multiple strategies at once?
Because portfolios smooth sequences. Two strategies with different behaviors — a breakout and a fade, an index and a metal — rarely have their bad days in the same place. The combined equity curve typically carries a smaller worst-stretch relative to its speed than either strategy alone, which is exactly the trade an eval rewards. This is why I publish per-strategy numbers but plan in weighted combinations.
How do I actually compute all this?
I got tired of spreadsheeting it, so I built the tool I wanted: drop in NinjaTrader Strategy Analyzer CSVs — any strategies, mine or yours — set contracts per strategy, pick a firm-style profit target ($1,500 / $3,000 / $4,500 / $6,000 / $9,000 or custom), and it computes the weighted equity curve, max drawdown with the drawdown periods marked, the 10 worst days, and a days-to-fund estimate at your chosen target. It's the same tool behind the backtest data on my Results page. An estimate from historical data is still an estimate — the point is replacing hope with arithmetic before the eval fee leaves your card.
FAQ
How many days does it typically take to pass a futures eval?
There's no honest universal number — it depends on your target, your strategy's realistic daily average at survivable size, and luck of sequence. The useful move is computing your estimate from your data rather than trusting anyone's typical.
Is a faster pass better?
Not if speed came from oversizing — the same sizing that passes in a week blows the drawdown the week variance turns. Firms also generally dislike pass patterns that look like one lucky oversized swing; consistency reads better and survives better.
Does passing the eval mean the strategy will keep performing?
No — an eval pass proves the setup fit that firm's rules over that stretch. Past performance, backtested or live, doesn't guarantee anything forward. Keep the same risk discipline after funding that got you through the eval.
The Prop Firm Analyzer — included free with Elite, or $39.99 standalone — runs this same math on your own Strategy Analyzer CSVs: set your contract sizes and targets and watch the days-to-fund estimate move.
Educational content, not financial advice. Futures trading involves substantial risk of loss and is not suitable for all investors. All referenced performance data is hypothetical backtested performance — see the disclosures on linked pages.