Guide · Basics
Outside Days and Key Reversals: What It Means When a Candle Swallows the Day Before
An outside day trades both above the previous day's high and below its low. When it also closes on the wrong side, it can mark a turning point, as Mina's October 5, 2026 candle did a day before a 24% drop.
An outside day is a daily bar whose range completely contains the previous day's range: its high is above the prior high and its low is below the prior low. On a candlestick chart, the new bar looks as though it has swallowed the one before it. The name comes from bar charts, where the new bar sits 'outside' the old one on both ends. It's the opposite of an inside day, where the range shrinks and the market pauses.
On its own, an outside day only tells you that volatility expanded and that both buyers and sellers had a turn in control. What matters is where the bar closes. If the market pushes to a new high first, then falls through the previous day's low and closes there, the buyers who drove the early move are left trapped above the market. That version is called a bearish outside reversal, and when it happens after a long advance and at a new high, traders often call it a key reversal day. The bullish version is the mirror image: a new low, followed by a rally that closes above the previous day's high.
Mina Protocol provided a clean example in October 2026. MINA had risen more than fourfold from its June 30 low of $0.0367. On October 4 it traded between $0.1549 and $0.1700 and closed at $0.1577. On October 5 it rose early to $0.1714, a new 2026 high, then sold off through the US session and closed at $0.1492 — below October 4's low of $0.1549 and down 5.4% on the day. The next day, October 6, MINA fell 23.7% to $0.1139 in a steady slide that lasted almost the entire session, and early on October 7 it dropped further, to $0.1012, about 41% below the October 5 peak.
A useful comparison is iExec's RLC on October 6, 2026. It rose to $1.077, almost 48% above the day's open, then gave nearly all of it back to close at $0.7429. That's a dramatic reversal, but it wasn't a full outside day: RLC's low that day, $0.6759, stayed well above the previous day's low, and it still closed slightly higher than the day before. A long upper wick shows rejection of higher prices; a bearish outside reversal adds a close below the prior day's range, which is a stronger statement because it erases the previous day's entire trading range as well as the current day's gains.
Like any single-candle pattern, outside days fail often. Two things make them more meaningful. Context: an outside reversal after a long trend and at a new high or low carries more weight than one in the middle of a range. And volume: a reversal on heavy volume shows that many traders participated. Some traders also wait for confirmation — a close the next day in the direction of the reversal — before acting, accepting a worse price in exchange for fewer false signals.
If you use the pattern, the levels it creates are practical. For a bearish outside reversal, the high of the outside day is a natural invalidation level: if the market trades back above it, the sellers' message has been rejected. For a bullish reversal, the low plays that role. Because outside days have wide ranges, the distance to that level can be large, so position size has to shrink accordingly. Our guides to inside days, long upper wicks and invalidation levels cover the related ideas.