Triangles:

A triangle is a chart pattern that’s characterized by a converging price range that’s typically followed by the continuation of the trend. The triangle itself shows a pause in the underlying trend but may indicate a reversal or a continuation.

Ascending triangle:

The ascending triangle forms when there’s a horizontal resistance area and a rising trend line drawn across a series of higher lows. Essentially, each time the price bounces off the horizontal resistance, the buyers step in at higher prices, creating higher lows. As tension is building at the resistance area, if the price eventually breaks through it, it tends to be followed by a quick spike up with high volume. As such, the ascending triangle is a bullish pattern.