Maximum Favorable Excursion (MFE)

Maximum Favorable Excursion (MFE) is the best unrealized profit a trade reaches between open and close. It is recorded in money, not points, so you can compare a tick scalp and a multi-hour swing on the same axis. Log only realized P&L and you throw away half of what each trade told you.

What MFE actually measures

MFE is the peak of your open P&L curve while the position was live. Take every price between your fill and your close, mark the one that would have given you the largest profit at that instant, and that is your MFE. In the Tradeways journal we compute it from 1-second OHLCV bars sourced through Databento, scanning every bar in the window. Anything coarser (1-minute, 5-minute) systematically underestimates the peak.

"Between entry and exit" matters. MFE only counts bars where the position was open. The move that happened after you closed is a different metric, Maximum Continuation Excursion. Confusing the two is the most common first mistake.

Two practical notes. MFE is stored in money (ticks in your favor times tick value), so 4 ticks on NQ and 4 ticks on ES are not the same number. On shorts, MFE is the lowest price reached, mirrored to positive money. The semantics are always "best for the position you actually held".

What the gap to realized P&L tells you

The signal is the gap, not the number on its own. Realized P&L is what you booked. MFE is what was available. The difference is the part of the move you saw on screen but did not take home.

If MFE sits well above realized on a winner, the move was there and your exit logic let it walk. If MFE and realized are close, you held the move well. On a losing trade, a high MFE is a different story: the trade was in profit and you let it round-trip. Tag those separately, because the fix is psychological, not analytical.

How to read it on a single trade versus across many

On one trade, MFE is anecdote. Maybe the market spiked a second before you exited, maybe it did not. A single high-MFE outlier proves nothing about your exits.

Across 50 or more trades of the same setup, the picture changes. The distribution of realized / MFE becomes a structural property of your exit rules. A setup that averages 0.35 is a setup where your target sits in the wrong place. A setup that averages 0.85 is one to size up rather than tinker with.

Looking at MFE, MAE and MCE all three together gives you the full picture. MFE alone answers one question: whether you are leaving money on the table during the hold.

Common misreads

A few traps that show up regularly when traders first start logging MFE:

• Stop-loss exits. If the trade hit your stop, MFE is usually small and tells you little. Filter these out when you study exit quality.
• No-target trades. MFE assumes a target you could plausibly hit. If the plan was a trailing exit, compare to the trail, not the global peak.
• Low sample. Ten trades is not a distribution. Wait for 50 closed trades in the same setup before drawing conclusions.
• Confusing MFE with MCE. MFE stops at your exit. The move afterwards is Maximum Continuation Excursion.
• Comparing across instruments raw. 200 dollars on CL is not 200 dollars on MES. Use ticks-in-favor or R-multiples when you cross instruments.

What to do with it

Three concrete moves once MFE is in your journal next to every closed trade.

First, log it automatically. If you have to type it in, you will stop. The Tradeways journal computes it on close from the 1-second feed, so the number is there before you write your notes.

Second, look at the distribution of realized / MFE across your last 50 trades, sliced by setup. Sort setups by median ratio. The bottom of that list is where your exits bleed most, and it is the cheapest part of your process to fix, because the entry already works.

Third, when a setup shows a fat right tail (high MFE, low capture), open three of those trades and look at the chart at your exit. Almost always the same pattern repeats: first pullback, first round number, first volume cluster. That is a rule you can write down and test.

The complement is the loss side, Maximum Adverse Excursion. MFE tells you how much of the move you took. MAE tells you how much heat you sat through to get it. You want both numbers on every trade.