Plus Directional Movement (PDM) weekly BTC index - The PDM is a momentum indicator that measures the strength of a trend in the positive direction. The weekly PDM is calculated by determining the difference between the week's high price and the previous week's high price smoothed by a 14-period moving average. Higher PDM values indicate higher momentum in the positive (higher price) direction. The default triggers for this indicator are PDM values above 55 for tops and below 14 for bottoms.