kingchenc
d2f99efd78
The original taxonomy was four classical families plus a statistics group, with the F1-F12 expansion slotted in as sub-categories. This regroups the whole 71-indicator catalogue into eight top-level families, each with at least five members: Moving Averages (12), Momentum Oscillators (13), Trend & Directional (9), Price Oscillators (5), Volatility & Bands (12), Trailing Stops (5), Volume (9), Price Statistics (7). - Wiki: docs/wiki/indicators/ reorganised into eight family folders; all 71 indicator pages moved with `git mv`. Every internal cross-link is normalised to `../<family>/Indicator-X.md`, each page's `Family` field is set to its new family, and two pre-existing `../Indicator-Chaining.md` links (should have been `../../`) are corrected. A link check confirms every relative wiki link resolves. - Indicators-Overview.md fully rewritten around the eight families; Home.md indicator reference and the README family table follow suit. - Warmup-Periods.md gains the eight F13 indicators; CHANGELOG records the 46-indicator expansion (25 -> 71) and the eight-family taxonomy. - Tests: Node indicators.test.js and Python test_new_indicators.py cover all eight new indicators (Node 91/91, Python 117/117 green). cargo fmt + clippy (core/wickra/data/wasm/node) clean; 508 core tests, 25 data tests and 74 doctests green.
136 lines
3.2 KiB
Markdown
136 lines
3.2 KiB
Markdown
# MedianPrice
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> Median Price — the bar's `(high + low) / 2`, the midpoint of its range.
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## Quick reference
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| Field | Value |
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|-------|-------|
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| Family | Price Statistics |
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| Input type | `Candle` (uses `high`, `low`) |
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| Output type | `f64` |
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| Output range | unbounded (price scale) |
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| Default parameters | none (no parameters) |
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| Warmup period | `1` |
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| Interpretation | The midpoint of the bar's range, ignoring open and close. |
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## Formula
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```
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MedianPrice = (high + low) / 2
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```
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The median price is the centre of the bar's range — it discards where the bar
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opened and closed entirely. It is the price series Bill Williams'
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[`AwesomeOscillator`](../momentum-oscillators/Indicator-AwesomeOscillator.md) is built on,
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and a useful close substitute when the close is noisy relative to the range.
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## Parameters
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`MedianPrice` takes **no parameters** — `MedianPrice::new()` in Rust,
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`wickra.MedianPrice()` in Python, `new ta.MedianPrice()` in Node.
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## Inputs / Outputs
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From `crates/wickra-core/src/indicators/median_price.rs`:
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```rust
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impl Indicator for MedianPrice {
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type Input = Candle;
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type Output = f64;
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// update(&mut self, input: Candle) -> Option<f64>
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}
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```
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`MedianPrice` is a **candle-input** indicator that reads `high` and `low`. In
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Python the streaming `update` accepts a 6-tuple or a dict; the batch helper
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takes `high`, `low` numpy arrays. Node and WASM expose `update(high, low)` and
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the matching `batch`.
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## Warmup
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`MedianPrice::new().warmup_period() == 1`. It is a stateless per-bar transform
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— it emits a value from the very first candle.
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## Edge cases
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- **No warmup.** Every candle produces a value immediately.
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- **Reset.** `mp.reset()` only clears the `is_ready` flag; there is no
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rolling state to discard.
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## Examples
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### Rust
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```rust
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use wickra::{Candle, Indicator, MedianPrice};
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let mut mp = MedianPrice::new();
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let v = mp.update(Candle::new(10.0, 12.0, 8.0, 11.0, 1.0, 0)?);
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println!("{:?}", v);
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Ok(())
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}
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```
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Output:
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```
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Some(10.0)
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```
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`(12 + 8) / 2 = 10`. This matches the `reference_value` test in
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`crates/wickra-core/src/indicators/median_price.rs`.
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### Python
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```python
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import numpy as np
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import wickra as ta
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mp = ta.MedianPrice()
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print(mp.batch(np.array([12.0]), np.array([8.0])))
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```
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Output:
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```
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[10.]
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```
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### Node
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```javascript
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const ta = require('wickra');
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const mp = new ta.MedianPrice();
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console.log(mp.batch([12], [8]));
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```
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Output:
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```
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[ 10 ]
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```
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## Interpretation
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The median price is the most range-centric of the three transforms — it is
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blind to the close. Use it when the question is "where did this bar trade?"
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rather than "where did it settle?", or as the input to a Bill Williams setup.
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## Common pitfalls
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- **Expecting the close to matter.** It does not — by definition the median
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price ignores both the open and the close.
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## References
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The Median Price; the `(H + L) / 2` definition is standard (TA-Lib's
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`MEDPRICE`).
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## See also
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- [Indicator-TypicalPrice.md](../price-statistics/Indicator-TypicalPrice.md) — `(H + L + C) / 3`.
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- [Indicator-WeightedClose.md](../price-statistics/Indicator-WeightedClose.md) — `(H + L + 2C) / 4`.
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- [Indicators-Overview.md](../../Indicators-Overview.md) — the full taxonomy.
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