Prices have soared in just the past three months. Soared is not a strong enough description. DXCM was trading around $180 in the middle of March and now it has surged to $420. Amazing.
In the daily bar chart of DXCM, below, we can see that prices look extended when compared to the rising 50-day moving average line and the rising 200-day moving average line. Trading volume does show an increase from the middle of February but the turnover has been huge in recent days. There was an upside gap a few days ago and while it could be a runaway or measuring gap it is also quite possible it could be an exhaustion gap.
The daily On-Balance-Volume (OBV) line has been strong since the middle of March but certainly not as strong looking as the price chart. The Moving Average Convergence Divergence (MACD) oscillator is well above the zero line and pointed higher.