The flag patterns are continuation patterns, which means the price enters a brief consolidation period before it continues in the trend direction. Traders would expect to recognize bullish flags on up trends and bearish flags on down trends.
By analysing price action, traders can benefit as the chart patterns can signal a potential reversal to the trend and open positions accordingly. That the reversal patterns can appear in any time frame suggests they can be used by both swing traders and short-term day traders.
As the price action patterns are formed across multiple time frames, traders can take advantage of the continuation patterns and either day trade or swing trade, depending on their preference. In most cases, the continuation chart patterns can be expected especially after a strong move by the markets.
Just like any new pattern, a trading strategy requires time to understand and get used to. You cannot expect to make a profit right off the bat just because the strategy made money for some other trader. The truth is traders need to spend time analysing their trading strategy before they can expect to make a profit from it.