A triangle connects separate reaction highs and lows into converging boundaries. Distinguish their slopes, the preceding trend and the actual breakout. A formation's name is neither a complete trading signal nor a probability of success.
Symmetrical Triangle has lower highs and higher lows. StockCharts describes it as frequent consolidation within a trend, but also allows for reversal. The next move's direction should not be inferred solely from the symmetrical shape before a breakout. [1]
Ascending Triangle connects approximately equal highs with horizontal resistance and rising lows with an upward boundary. StockCharts assigns it a bullish character even outside continuation of a rise. This interpretation does not guarantee an upward breakout. [2]
Descending Triangle has approximately equal lows along horizontal support and declining highs above it. The bearish interpretation describes an expected direction, not certainty. The formation can fail, and touching support alone is not a breakout. [3]
Each Trendline needs at least two separate points, hence at least four for both boundaries. In the ascending variant, subsequent lows must rise; in the descending variant, subsequent highs must fall. Define the horizontal boundary's tolerance beforehand; do not draw lines retrospectively merely to fit a desired outcome. [1] [2] [3]
For the symmetrical variant, StockCharts uses confirmation through a Close beyond the boundary and allows a price or time filter. A test must specify precisely what counts as a breakout. A touch, brief excursion and confirmed close are different; a return to the boundary may or may not occur. [1]
Classical StockCharts descriptions deal with weeks to months, declining volume inside the formation and increasing volume at the breakout. Applying this to another Timeframe requires your own rules. A price sketch without volume data or a time scale does not confirm these conditions. [1] [2] [3]
After a breakout, the formation's greatest height can be added to the upward breakout price or subtracted for a downward breakout. For horizontal boundaries, the projection starts from their level. This is a geometric scenario, not a return, probability or guaranteed future price. [1] [2] [3]
A swing confirmed later is not known at the moment of its high or low. Separate rule selection from evaluation, and include failed breakouts, fees and Slippage. A correctly drawn triangle alone does not demonstrate a strategy's profitability. [4] [5]
Horizontal resistance, rising lows and a separate target
For the clearest picture, read this entry together with Trendline, Support and Resistance, Breakout, False Breakout, Backtesting. The reverse links also lead from Flag and Pennant, Wedge Pattern.
01Does every triangle mean trend continuation?+
No. Symmetrical Triangle may accompany continuation or reversal. In the other variants, the directional interpretation likewise does not guarantee the outcome. Predefined rules and the observed breakout are decisive.
02Is touching the upper boundary a confirmed breakout?+
No. A touch remains at the boundary. If the rule requires a Close above it, that closing price must actually be available; any filter must be defined beforehand.