What is Double Bottom?
Definition
A double bottom is a bullish reversal chart pattern that forms when a stock declines to a support level twice with a moderate rally in between, creating a W-shaped formation. A break above the middle peak confirms the pattern and signals a potential trend reversal.
Detailed Explanation
The double bottom forms when price declines to a support level, bounces, declines again to approximately the same level, and bounces again. The pattern is confirmed when price breaks above the resistance level formed by the peak between the two bottoms. The second bottom does not need to be exactly at the same price as the first — within 3-4% is generally acceptable.
The measured move target is calculated by taking the distance from the bottoms to the middle peak and projecting it upward from the breakout point. For example, if the bottoms are at $40 and the middle peak is at $50, the target is $60 after breaking above $50.
The time between the two bottoms matters. Double bottoms that form over several weeks to months are more significant than those forming over just a few days. The pattern also works best when the two bottoms occur on declining volume and the breakout above the middle peak happens on expanding volume, indicating accumulation.
The double top is the bearish mirror image, forming an M-shape at the end of uptrends. Both patterns are among the most common and widely traded chart formations. False breakouts do occur, so traders typically wait for a close above (or below) the confirmation level rather than acting on an intraday breach.
Example
A stock drops to $50 (first bottom), rallies to $60 (middle peak), drops to $51 (second bottom), then breaks above $60 with strong volume. The target is $70 ($60 + ($60 - $50)).
Frequently Asked Questions
How do I confirm a double bottom?
What is the difference between a double bottom and a W pattern?
Related Terms
Volume
Volume is the total number of shares or contracts traded in a security during a given period, typically a single trading day. It measures the intensity of trading activity and is a key indicator of market interest, liquidity, and the strength of price movements.
Support and Resistance
Support and resistance are price levels where a stock historically tends to stop falling (support) or stop rising (resistance). These levels form because of concentrated buying or selling interest and are foundational concepts in technical analysis.
Head and Shoulders
Head and Shoulders is a chart pattern consisting of three peaks — a higher middle peak (the head) flanked by two lower peaks (the shoulders). It is one of the most reliable reversal patterns in technical analysis, signaling a potential shift from an uptrend to a downtrend.
Breakout
A breakout occurs when a stock's price moves above a resistance level or below a support level with increased volume. Breakouts signal that the balance of supply and demand has shifted and often lead to sustained price moves in the direction of the break.
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Disclaimer: The information on this page is provided for educational and informational purposes only and does not constitute investment advice. AI-generated analysis may contain errors or inaccuracies. Always conduct your own research and consult a qualified financial advisor before making investment decisions.
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