Double Tops and Bottoms (M and W): Confirmation and Target

The M shape and the W shape

A double top is a shape in which, after an advance, two highs form at a similar height with one trough between them. Because it resembles the letter M, it is called an M pattern, and it also goes by names such as M top or twin peaks. A double bottom is its upside-down version, the W pattern, made of two lows of similar height after a decline and the peak between them; it is also called a W bottom. In this article, as with the head and shoulders, the horizontal line through the trough's low in an M and the peak's high in a W is called the neckline. Read as participant behaviour, a double top is price that was pushed back from the first high, climbed again, and got blocked again near the same level. The explanation attached is a mix of people who bought near the first high selling at break-even and others who already remember that price as a top. A double bottom is read the other way: those who bought at the first low supported a similar price again on the second decline. The reading order is whether there was a prior trend, how high and how far apart the two extremes are, and where the neckline lies.

• Double top (M): two highs and the trough between them. The trough's low is the neckline
• Double bottom (W): two lows and the peak between them. The peak's high is the neckline
• It is described as a reversal pattern only when there is a prior trend

Confirmation comes with a close beyond the neckline

A double top is complete when, after the second high, price closes below the neckline, that is, the trough's low. In trend terms it is a close below the previous low, meaning the uptrend structure of rising highs and rising lows has broken. A double bottom, conversely, completes when price closes above the high of the peak between the two lows. Until then, the only confirmed fact is that price stalled twice near the same level; which way it resolves has not been decided. A common mistake is to treat a single large bearish candle at the second high as completing the double top. If that candle closed above the neckline, price has merely been pushed back from a high once. When the trough is shallow and the neckline sits close to the two highs, confirmation comes quickly but the pattern is small; when the trough is deep, confirmation takes longer but the pattern is larger. As in the chart, the textbook order is to name it only after seeing a close below the neckline.

The two highs do not have to match

The two highs (or lows) do not have to be exactly the same height. The second high may be slightly lower, or it may poke just past the first and get pushed back. There is no fixed standard for how close they must be, so the difference people accept varies. The spacing between the two highs matters as well. Two highs only a few candles apart cannot be told apart from a single wobble, so textbooks say there should be enough time between them. As for volume, the typical picture has it lighter on the second high than on the first, and for a double bottom, rising on the neckline breakout. This too describes the typical picture, not a condition. In practice, some people fix the allowed difference in advance as a percentage or as a multiple of a volatility measure such as ATR. The same difference looks small on a volatile instrument and large on a quiet one. When the second low dips slightly under the first and comes straight back, some explanations read it as a rebound after the stop orders clustered below the first low were absorbed. If price keeps going lower, though, it is simply a decline that broke the low.

Calculating the measured target

The measured target works the same way as for the head and shoulders. For a double bottom, you measure the height from the low to the neckline and move it upward by that amount from the point where price broke through the neckline. In the chart below, the first low is 108 and the neckline is 121, so the height is 13 and the measured target is 134. When the two lows differ in height, some use the lower one and others use the average, so the target varies slightly even on the same chart. For a double top, conversely, the height from the high to the neckline is subtracted downward from the break point. Either way it is only a calculation that transfers the pattern's size; it does not mean price will get there. As for the order of checks, first see whether a candle closed above the neckline, then decide for yourself which basis you use for the low (wick or close, the lower one or the average). Changing the basis every time amounts to picking the target you want. Also note that if there is a level where price spent a long time during the earlier decline on the way to the target, it may stall there first.

Triple tops and triple bottoms

When highs form three times at a similar height, it is called a triple top; three lows make a triple bottom. Confirmation works the same way: a triple top completes when price closes below the neckline set by the two troughs between the highs (if the two troughs differ in height, usually the lower one). If the middle high stands clearly above the other two, the shape becomes a head and shoulders, so a triple top can also be seen as a head and shoulders whose head is no higher than its shoulders. Being turned back three times at the same price means that level was a conspicuous resistance, but it sometimes gives way on the fourth attempt, so the count alone cannot decide the outcome. If the third high comes in slightly lower than the first two, some people see it as a lower-high downtrend structure already under way; conversely, a break upward on the third attempt draws extra attention because it clears resistance that held for a long time. It is often indistinguishable from price tapping the top of a range several times, so in the end the decision depends on whether a close appears beyond the neckline.

A second high before confirmation has only touched resistance

When the second high stalls near the first, it is tempting to call it a double top, but all that has been confirmed at that point is that price touched the resistance zone of the earlier high one more time. From there, three paths are all possible: it breaks the neckline and becomes a double top, it turns into a range bouncing between the two prices, or it breaks through the resistance and climbs. The chart below shows the third case. The Support & Resistance Finder groups price levels where swing highs cluster like this into zones, but it does not tell you which way a zone will resolve. Each of the three paths is identified differently. A double top is confirmed by a close below the trough's low, a range by repeated moves between the two prices, and a resistance breakout by a close above the two highs. Even while a rebound continues, a candle may hesitate once more near the first high, so which path it is can only be settled by closed candles.

Which timeframe is the W on?

The same W can be a shape that formed over a few hours on a 15-minute chart, or one that took months to years on a weekly chart. The shorter the candles, the more often you notice price stalling twice near the same level, and the harder it gets to distinguish from noise. The measured target also scales with the pattern's size, so a W on short candles gives a small target. And if a larger timeframe is in an ongoing downtrend, a double bottom on a smaller timeframe may be just a brief bounce within the bigger move. How to read moves that look different on each timeframe together is covered in the article on multi-timeframe analysis. The order of judgment is to look at the trend on the larger timeframe first and then look for the W on the smaller one. If the daily chart is in a downtrend and a W appears on the hourly chart, many read it as a pullback within the bigger move; if bottoms on the daily and hourly charts line up at the same price zone, that zone is seen as more meaningful.

What this article does not say

Figures on how often double tops and double bottoms complete and reach their targets are not included here. The results change a great deal depending on the allowed difference between the two highs, the spacing and the confirmation criteria, and the statistics this course measured directly on past Binance candles do not include chart patterns. These shapes are easy to find on past charts, but while one is forming at the right edge of the chart, you cannot tell which of the three paths above it is on. The Chart Prediction Quiz, where you judge charts with the outcome hidden, is one way to see how different a shape seen in hindsight is from one read in real time. On past charts the completed Ws are the ones that stand out, but remembering that some candidates began with the same shape and never completed helps keep your reading of the shape calmer. This article explains the definition of the shape and how to confirm it; it does not tell you what to do when you see it. Any decision rests on each person's own criteria and responsibility.

What looks different in coins and stocks

With stocks, news that arrives while the market is closed is priced in at the next open, so it is common for price to open with a gap well above a double bottom's neckline. In that case the measured target changes depending on whether you treat the neckline or the open above the gap as the breakout point, and a move back toward filling the gap can look like a retest. Korean stocks have a daily price limit of plus or minus 30%, so in a sharp decline the second low may not form in a single day and can take several days to print. Coins and US stocks have no per-stock daily limit. Coins trade around the clock and rarely gap, but long wicks are frequent, so whether you compare the two lows by wick or by close can decide whether it is a W at all. Volume differs in character as well. Large Korean stocks such as Samsung Electronics and SK Hynix, or large US tech stocks, are judged on volume counted for defined markets, while coin volume is counted separately on each exchange, so one exchange's volume does not represent the whole market. Coin trading tends to thin out at weekends, so a low made then may have been printed on light trading.

Common mistakes

When watching this shape on a live chart, separate the candle in progress from closed candles. Even if the live candle is above the neckline, it is not confirmation if it ends back inside, and a signal drawn from that candle can disappear on the next update. The second low is also not confirmed as a low until a few higher candles form to its right, so tools that find lows automatically label them late or move them later. These are the mistakes most often seen with this pattern.

• Calling the W complete just because a rebound started from the second low
• Treating the moment the live candle crosses the neckline as a breakout
• Reading two lows formed during a sideways phase, with no prior decline, as a reversal
• Switching between wicks and closes to measure the two lows until the shape you want appears
• Treating the measured target as a value price will reach and ignoring resistance in between
• Looking only at the W on a small timeframe and missing the downtrend on the larger one