Certain things need to happen for the sensor to capture swings. Here are some reasons why your swing may not be captured if:

• The swing was too slow to be recognized as an actual swing. Must swing at 20 MPH or high to register. 
• You didn’t make contact with the ball.
• Your swing is a bunt.
• Pause two to three seconds between swings.

Repeat the swing, correcting these conditions. If your swing is still not captured:

• Make sure that your sensor is connected to the device and the sensor’s battery status is greater than 20%.
• Make sure the bat’s Length and Weight are correct.

Once the list above has been tested. The last option would be to reset the sensor and test the sensor again.