according to this:

http://www.americanbulls.com/StockPa...

This is just part of the page:

There are three possible cases of confirmation. You have to follow the next session carefully to check if these cases will hold or not:

The market opens with an upward gap, signaling a bullish sentiment in the first case. Your benchmark will be the opening price. If the prices stay over the benchmark, go long. Any white candlestick with an upward gap is a valid confirmation criterion.

In the second case, the market opens at a level, equal to or below the previous day’s close. The benchmark is that closing price. If prices during the session stay over the benchmark, go long. Any white candlestick closing above the previous day’s close is the second confirmation criterion.

If, however, in both cases, the prices during the session start coming below the benchmark, avoid buying. Sell if you feel a definite tendency in prices to close the day below the benchmark.

The third case of confirmation is rarely observed. The market opens with a big downward gap suggesting a very bearish day, and the day ends with a long white candlestick, but still closing below the previous day’s close. However, such a day satisfies the third confirmation criterion and in this case the closing price of the long white candlestick will be taken as the price of confirmation