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Failed expansion → mean reversion

The most repeatable range setup.

9 min · Intermediate · Free lesson

What you'll learn

  • Recognize a failed expansion: a break outside the range that is not accepted
  • Plan a mean-reversion trade back toward the midpoint and the opposite edge
  • Size the trade to 1% risk and confirm at least 2R to the planned target

The idea

A balanced market eventually tries to break out. Sometimes it succeeds and a trend begins. Often it does not. Price pokes above the range high or below the range low, finds no follow-through, and falls back inside. That is a failed expansion.

Failed expansions are among the most repeatable range setups because they trap traders. Breakout buyers above the high are now holding a losing position inside the range. As they exit, their selling pushes price back toward the middle, and often to the other side.

Think of it like a rubber band. Price stretches outside the range, but nothing holds it there, so it snaps back toward the center. The snap is the trade.

How it works

  1. Confirm the range first. At least two tests of each edge, flat VWAP, overlapping bars.
  2. Watch the poke. Price trades beyond the edge. Note the volume. Weak or average volume is a warning that the break has no fuel.
  3. Wait for the failure close. The key signal is a candle that closes back inside the range. A wick outside that closes inside is the cleanest version.
  4. Trigger. Enter when the next candle breaks the failure candle's low (for a failed upside break) or high (for a failed downside break).
  5. Stop. Beyond the extreme of the failed break, plus a small buffer. If price gets back there, the breakout may be real after all.
  6. Targets. First the midpoint, then the opposite edge. The trade should offer at least 2R to the planned final target. If only the midpoint is realistic and it is less than 2R, pass.
  7. Invalidation. If price closes back outside the range and holds for two more closes, the expansion is being accepted. Get out.

Worked example

Hypothetical stock XYZ, 5-minute chart. Account: $20,000. Max risk: 1% = $200.

  • XYZ has rotated between $47.50 and $49.00 since 10:00. Midpoint: ($49.00 + $47.50) / 2 = $48.25. VWAP is at $48.22 and flat.
  • At 12:40 XYZ pushes to $49.35, above the range high, on volume below the session average.
  • That candle closes at $48.90, back inside the range, leaving a long upper wick. Failure close confirmed. Its low is $48.88.
  • The next candle breaks $48.88. Short entry: $48.85.
  • Stop: $49.45, $0.10 above the $49.35 failed high. Risk per share = $49.45 - $48.85 = $0.60.
  • Target 1: $48.25 (midpoint). Reward = $0.60, which is 1.0R.
  • Target 2: $47.60, just above the $47.50 range low. Reward = $48.85 - $47.60 = $1.25, which is 2.08R.

The trade qualifies because the planned final target is more than 2R. The midpoint is a checkpoint, not the reason for the trade.

Position size: $200 / $0.60 = 333.33, rounded down to 333 shares.

  • Dollar risk: 333 x $0.60 = $199.80.
  • If the full position reaches $47.60: 333 x $1.25 = $416.25, about +2.08R.
  • Position value: 333 x $48.85 = $16,267.05.

Now the version you would skip. Suppose the poke went to $49.80 on volume three times the average, and the candle closed at $49.70, outside the range. That is not a failure. It is a potential acceptance. No fade.

Common mistakes

  • Fading the poke before the close — a wick in progress can still close outside and become a real breakout — wait for the close back inside.
  • Fading a high-volume break — heavy volume outside the range can mean real expansion — only fade breaks that lack fuel and fail on a close.
  • Stop inside the range — the retest of the edge will tag it — put the stop beyond the failed extreme.
  • Taking a trade where only the midpoint makes sense — if the midpoint is less than 2R and the opposite edge is unrealistic, the trade fails the minimum — pass.

Checklist

  • Is the range confirmed with two or more tests of each edge?
  • Was the break outside on weak or average volume?
  • Did a candle close back inside the range?
  • Is my stop beyond the failed extreme?
  • Is the planned final target at least 2R away?

Practice: Failed-expansion log

  1. Use the Simulation Lab to find five confirmed ranges and replay them in hidden-candle mode.
  2. Each time price pokes outside a range edge, pause and record the break bar's volume versus the session average.
  3. Advance one candle. If it closes back inside, mark entry, stop beyond the extreme, midpoint and opposite-edge targets.
  4. Calculate reward-to-risk to the final target and 1% share size for a $20,000 account. Skip anything under 2R.
  5. Take qualifying trades in Paper Sim and log the R-multiple results in the Trade Journal.

Key takeaways

  • A failed expansion is a poke outside a range that closes back inside without follow-through.
  • Trapped breakout traders exiting push price back toward the midpoint and often the opposite edge.
  • Enter on a break of the failure candle, with the stop beyond the failed extreme.
  • The planned final target must offer at least 2R; the midpoint is a checkpoint.
  • A high-volume close outside the range that holds is acceptance, not a fade.

Glossary

  • Failed expansion — An attempt to break out of a balanced range that is not accepted and closes back inside.
  • Mean reversion — Price returning toward its average or fair value, such as a range midpoint or VWAP, after a stretch away from it.
  • Acceptance — Price closing and holding beyond a level for several bars, showing the market agrees with the new prices.

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