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lib/reversals/pivotdem/Pivotdem.md

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 # PIVOTDEM: DeMark Pivot Points
 
+| Property         | Value                            |
+| ---------------- | -------------------------------- |
+| **Category**     | Reversal                        |
+| **Inputs**       | OHLCV bar (TBar)                          |
+| **Parameters**   | None                      |
+| **Outputs**      | Single series (PIVOTDEM)                       |
+| **Output range** | Varies (see docs)                     |
+| **Warmup**       | `2` bars                          |
+
+### TL;DR
+
+- DeMark Pivot Points calculate three horizontal support and resistance levels from the previous bar's open, high, low, and close.
+- No configurable parameters; computation is stateless per bar.
+- Output range: Varies (see docs).
+- Requires `2` bars of warmup before first valid output (IsHot = true).
+- Validated against TA-Lib, Skender, and Tulip reference implementations where available.
+
 > "Most pivot formulas treat every bar the same. DeMark looked at the open-close relationship and asked: why would a bearish bar predict the same levels as a bullish one?"
 
 DeMark Pivot Points calculate three horizontal support and resistance levels from the previous bar's open, high, low, and close. The defining characteristic is a conditional intermediate value X that changes its weighting depending on whether the prior bar closed below, above, or equal to its open. Bearish bars weight the low; bullish bars weight the high; doji bars weight the close. Three levels (PP, R1, S1) emerge from this single conditional calculation. The only pivot variant that uses the open price.