Pin bars come in all different sizes, but they can basically be categorized into two camps: ‘Normal’ pin bars and ‘Long-Tailed’ pin bars. On a bullish pin bar formation, we will typically buy on a break of the high of the pin bar and on a bearish pin bar formation, we will typically sell on a break of the low of the pin bar. Be careful with large pin bars that form near the top of a move in an uptrend or the bottom of a move in a downtrend (so bullish pin near top of up-move in uptrend, for example) as these can actually be signals that the market direction may move the opposite way from what the pin bar implies.