Double Bottom
A bullish reversal pattern where price tests the same support twice without breaking lower — signalling that sellers are exhausted and buyers are ready to take charge.
Definition
A Double Bottom is a bullish reversal chart pattern that forms at the end of a downtrend when price falls to a significant low, bounces to a resistance area known as the neckline, sells off again to approximately the same low, and then recovers with renewed buying strength. The two troughs should be at roughly equal depths, and the pattern is only confirmed when price closes above the neckline on strong volume. The Double Bottom is the bullish mirror image of the Double Top pattern and is closely related to concepts of support and breakout trading.
Why it matters
The Double Bottom pattern reflects a fundamental shift in market psychology: after an extended downtrend, sellers attempt to push price to new lows but find that buyers step in at the same level a second time with equal or greater conviction. This double test of support demonstrates that the selling pressure driving the downtrend has been absorbed. In Indian markets, significant support zones — such as 200-day moving averages, prior swing lows, and major Fibonacci retracement levels — frequently generate Double Bottom patterns because institutional participants place large buy orders at well-known technical levels.
For NSE equity traders and F&O participants, the Double Bottom is a high-conviction setup because the confirmed neckline breakout often triggers a cascade of short-covering from traders who were positioned for further downside. This short-covering dynamic amplifies the move, making call options purchased near the second trough or on the neckline breakout particularly effective in a rising implied volatility environment. Combining the pattern with put-call ratio data provides additional confirmation of the sentiment shift.
How it works
The pattern develops in four stages. First, a downtrend carries price to a meaningful low — the first bottom — where buyers provide initial support. Second, a relief rally carries price up to the neckline before sellers reassert themselves. Third, price declines again toward the first bottom's level but finds support at approximately the same area, often on lower volume than the first decline — indicating that selling pressure is diminishing. Fourth, when price rallies through the neckline on strong volume, the pattern is confirmed. The measured target is the distance from the trough to the neckline, added to the neckline breakout price.
Example
Suppose a hypothetical NSE mid-cap stock declines from Rs 800 to Rs 580 during a broader market correction — the first bottom. It then bounces to Rs 680, forming the neckline. The stock retreats again to Rs 590, just slightly above the first bottom, before buyers step in forcefully and volume begins to pick up. Price then rallies through Rs 680 on above-average volume, confirming the Double Bottom. The trough-to-neckline distance is Rs 100 (Rs 680 minus Rs 580), so the measured target is Rs 680 plus Rs 100 = Rs 780. A trader entering on the neckline breakout at Rs 680 would place a stop-loss below Rs 575 and target Rs 780.
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Pair Double Bottom setups with open interest data to spot where institutional buyers are accumulating.