There are many threads on this topic here at EliteTrader.com and some of the long time members that don't post here any more have done their own in-depth statistical analysis of Japanese Candlestick patterns including me (my former alias is
NihabaAshi).
I've studied
almost every published candlestick pattern in application to futures, exchange traded funds and forex currencies. In addition, I've taken it a few steps deeper via creating my own personal
sub-groups and
variations (e.g. there are +15 types of bullish white hammer patterns).
Summary:
* Do not use them all by themselves. Instead, use them as a secondary or confirmation signal.
* Do not use them to define the price action. Simply, you should already understand the price action (bullish, bearish or whatever) prior to the appearance of any candlestick pattern as an entry signal into what you already know about the price action.
* That understanding of the price action is called
market context. Without it, Japanese Candlesticks or anything else won't work.
* Do not use computer codes for real trading (e.g. automated or mechanical systems). In fact, I've never met a profitable trader as such that exclusively uses Japanese Candlesticks all by themselves without input from another method or market context.
* Overall...a particular pattern doesn't work but there may be a sub-group or variation that does work within market context (e.g. only a few sub-groups of those +15 bullish white hammer patterns do work...everything else about that pattern is just crap).
* Trade management after entry of a Japanese Candlestick is key to the pattern success. There has not been one publish research were the trade management was adequate nor any research into the sub-groups or variations.
However, with the above said, if you feel the need to backtest via computer codes and discover what some of us already know (read the above)...reveal your understanding of the price action (market context) and your trade management after entry.
I get into a little of this in my own thread here at ET called
Trading Hammers (revisited) @
http://www.elitetrader.com/vb/showthread.php?s=&threadid=52880
In addition, here's a recent discussion with a backtester about the importance of
market context in my discussions with a backtester name
guruji that has publish some of his testing results @
http://www.traderslaboratory.com/forums/f34/do-candlesticks-work-7900.html
Mark