doc headers

lib/volume/va/Va.md

@@ -1,5 +1,22 @@
 # VA: Volume Accumulation
 
+| Property         | Value                            |
+| ---------------- | -------------------------------- |
+| **Category**     | Volume                        |
+| **Inputs**       | OHLCV bar (TBar)                          |
+| **Parameters**   | None                      |
+| **Outputs**      | Single series (VA)                       |
+| **Output range** | Unbounded                     |
+| **Warmup**       | `> 1` bars                          |
+
+### TL;DR
+
+- Volume Accumulation (VA) measures the cumulative flow of volume weighted by where price closes relative to the bar's midpoint.
+- No configurable parameters; computation is stateless per bar.
+- Output range: Unbounded.
+- Requires `> 1` bars of warmup before first valid output (IsHot = true).
+- Validated against TA-Lib, Skender, and Tulip reference implementations where available.
+
 > "Volume tells you who's winning the argument between bulls and bears—VA keeps a running tally of the score." — Anonymous Trader
 
 Volume Accumulation (VA) measures the cumulative flow of volume weighted by where price closes relative to the bar's midpoint. When price closes above the midpoint, volume is considered buying pressure; when below, selling pressure. The cumulative sum reveals the net directional conviction of market participants over time.
@@ -230,4 +247,4 @@ var smoothedVa = new Ema(5); // 5-period smoothing
 - Williams, L. (1979). "How I Made One Million Dollars Last Year Trading Commodities." Windsor Books.
 - Granville, J. (1976). "Granville's New Strategy of Daily Stock Market Timing." Prentice-Hall.
 - Achelis, S. (2000). "Technical Analysis from A to Z." McGraw-Hill.
-- TradingView. "PineScript Volume Accumulation." Community Reference.
+- TradingView. "PineScript Volume Accumulation." Community Reference.