Double Bottom is a bullish reversal pattern usually found at the end of a downtrend. Double Bottom pattern can be easily identified when price reaches a equal low two consecutive times unable to push price to a new lower low to continue the downtrend then the price bounces sharply from the equal low area and then breaks the neckline.
The entry point of this trade pattern will be confirmed by a closing of price above the neckline. We can take help of RSI to see the momentum and the strength of the price movement.