Wyckoff trading method, page-1511

You will never know 'for sure' if any bar is what you think it may be, it is generally the response to the bar that helps to confirm your thinking, and you just keep building the story as the chart unfolds.

All you can do is look at the background of the chart, and the current trend, for the expected (positive or negative) influence over the chart,
then the current position of price in relation to expected support and resistance levels,
and then the actual individual bar & what it maybe saying,
and then trade it when an opportunity arrives that place the probabilities in your favour.

cheers