Roughly speaking, this would call for an angle between 45 and 60 degrees. If it is not possible to measure the angles, then a visual assessment will suffice. These distances can be measured by drawing a vertical line from the highest highs to the lead-in trendline. An example is provided below. Sometimes a small double top or a series of descending peaks forms.
Prices begin to decline towards the lead-in trendline and the right side of the bump forms.
As the stock advances during the lead-in phase, volume is usually average and sometimes low. When the speculative advance begins to form the left side of the bump, volume expands as the advance accelerates. The run phase begins when the pattern breaks support from the lead-in trendline. Prices will sometimes hesitate or bounce off the trendline before breaking through. Once the break occurs, the run phase takes over and the decline continues.