You cannot use the candle stick pattern as a standard alone. Not every Bull candle is worth taking i.e. will result in a subsequent rise in price. There are a number of things to consider such as: does it stand out?, is it at a swing low. etc
But there is no short answer - experience will tell you which Bull candle is reliable.
Well, yeah. Andrew Lo from MIT demonstrated statistically significant non-randomness in security prices. Published a book about it. So, TA can work.
Its all about context.. a bull candle is simply one bar... You can look at volume on and/or surrounding the candle.. As someone mentioned is the candle happening at a support level. You have to have entry, exit and money management figured out-> how will you trade your bull candle setup -> which give a huge number of possible systems that have each have different performance metrics, etc - all from one damn bull candle base. Many variables you're original post doesn't address
I have see review of bull candle just one time. Then i was just shock bcoz there was i saw just numbering movement. It was very difficult for person to understand easily. I know day by day they can understand. But usually i don't like the format of bull candle, that's unreliable.