The Half Trend BT indicator detects potential trend reversals by analyzing recent highs and lows over a specified period. It compares two selected price series—typically High and Low, but configurable to other price types such as Open, Close, or Median—using moving averages based on chosen smoothing methods and amplitude periods. The indicator plots an "Up" line (cyan) when an uptrend is detected and a "Down" line (magenta) for a downtrend, while internally storing trend direction numerically (+1 or -1). A main output line (gray) reflects current support and resistance levels. Optional features include drawing arrows on bars where trend reversals occur and calculating pip differences between signals, which are displayed as labels and trendlines on the chart. This indicator supports multiple markets including Forex, indices, commodities, cryptocurrencies, and stocks.