This screen finds a downward breakout through a level 1 TD demand line, a rising line through the two most recent TD point lows with one bar on each side. Thomas DeMark draws TD lines objectively through the two most recent TD points, highs or lows with lower highs or higher lows on each side; the level, or magnitude, is the number of bars on each side. A close below the demand line signals that the advance may be over; higher magnitudes give fewer but more significant lines.
