The double bottom reversal as the name suggests is a trend reversal pattern that basically is going to turn a downtrend into an uptrend. You can trade the Double Bottom chart pattern strategy on any time frame however the bigger the time frame the bigger the potential profit.
Disclaimer: Trading carries a high level of risk, and may not be suitable for all investors. Before deciding to invest you should carefully consider your investment objectives, level of experience, and risk appetite. The possibility exists that you could sustain a loss of some or all of your initial investment and therefore you should not invest money that you cannot afford to lose. You should be aware of all the risks associated with foreign exchange trading, and seek advice from an independent financial advisor if you have any doubts.