I have used and found that somehow accurate but I am having better strategies than that hence now into my practices anymore. I like to emphasize that these kind of basic strategies ate always time lagging one hence you may miss out perfect entries and exit levels if you are into active trading. Hence better adopt or derive some pivot point kind of strategies which may help you to enter/exit positions at predetermined levels.
I stopped making use o candle stick patterns for same exact reason; I must say candle stick patterns are good in higher time frame still you cannot catch accurate entry or exit levels.
Unfortunately the ones that are very famous and popular are known by too many people, which means that people who are smart already act better than that and move accordingly. This is the reason why the most popular strategies are one step behind of the action, and yes it could still be profitable but it is not the optimized most profitable method and that is why you should always be careful about what you are doing when picking a strategy.
If you pick the most popular methods then in the long run you will profit but not as much as you could, if you pick a new one then you could either make more profit or you could end up losing money as well. All of these are just methods that you should not be really focusing on because they are just way too risky.