mirror of
https://github.com/softwaredevelop/mql5.git
synced 2026-08-08 18:17:44 +00:00
Toh4iem9
56 lines
4.3 KiB
Markdown
56 lines
4.3 KiB
Markdown
# Volume Weighted Average Price (VWAP) Professional
|
|
|
|
## 1. Summary (Introduction)
|
|
|
|
The Volume Weighted Average Price (VWAP) is a benchmark indicator used by traders, particularly in intraday analysis, to determine the average price a security has traded at throughout a period, based on both price and volume. It provides a much more accurate picture of the "true" average price by giving more weight to price levels with higher trading volume.
|
|
|
|
A key feature of the VWAP is that it is **periodically reset**, typically at the start of a new day, week, or month.
|
|
|
|
Our `VWAP_Pro` implementation is a unified, professional version that allows the calculation to be based on either **standard** or **Heikin Ashi** price data, and offers selectable reset periods.
|
|
|
|
## 2. Mathematical Foundations and Calculation Logic
|
|
|
|
The VWAP is the cumulative ratio of the volume-weighted price to the cumulative volume over a given period.
|
|
|
|
### Required Components
|
|
|
|
* **Price Data:** The `High`, `Low`, and `Close` of each bar. The **Typical Price** `(H+L+C)/3` is standard.
|
|
* **Volume Data:** The volume for each bar.
|
|
|
|
### Calculation Steps (Algorithm)
|
|
|
|
1. **Start of a New Period (e.g., new day):** Reset the cumulative values to zero.
|
|
2. **For Each Bar within the Period:**
|
|
* Calculate the Typical Price: $\text{TP}_i = \frac{\text{High}_i + \text{Low}_i + \text{Close}_i}{3}$
|
|
* Update the cumulative sums: `Cumulative (TP x Volume) += TP_i \times \text{Volume}_i` and `Cumulative Volume += \text{Volume}_i`
|
|
3. **Calculate the VWAP:**
|
|
* $\text{VWAP}_i = \frac{\text{Cumulative (TP * Volume)}}{\text{Cumulative Volume}}$
|
|
|
|
## 3. MQL5 Implementation Details
|
|
|
|
Our MQL5 implementation follows a modern, object-oriented design to ensure stability, reusability, and a clean visual representation.
|
|
|
|
* **Modular Calculation Engine (`VWAP_Calculator.mqh`):**
|
|
The entire calculation logic is encapsulated within a reusable include file. This engine uses an elegant, object-oriented inheritance model (`CVWAPCalculator` and `CVWAPCalculator_HA`) to support both standard and Heikin Ashi data sources without code duplication.
|
|
|
|
* **Robust Period Reset Logic:** The calculator uses `MqlDateTime` structures to accurately detect the start of a new session, week, or month, ensuring the VWAP resets correctly under all conditions.
|
|
|
|
* **Clean Gapped-Line Drawing:** To provide a clear and definition-true visual separation between periods, the indicator uses a **"double buffer" technique**. It plots odd-numbered periods (1st day, 3rd day, etc.) and even-numbered periods (2nd day, 4th day, etc.) on two separate, overlapping plot buffers. This creates a distinct visual gap at each reset point and ensures the current, ongoing period is always fully drawn to the last available bar.
|
|
|
|
* **Intelligent Volume Handling:** The indicator automatically detects if the selected instrument provides **Real Volume**. If a user requests Real Volume on a symbol where it's unavailable (like Forex/CFDs), the indicator will fail to load and print an informative error message, preventing the display of a misleading, incorrectly calculated line.
|
|
|
|
* **Stability via Full Recalculation:** We employ a "brute-force" full recalculation within `OnCalculate` for maximum stability.
|
|
|
|
## 4. Parameters
|
|
|
|
* **Reset Period (`InpResetPeriod`):** The period at which the VWAP calculation resets. Options are `Session` (daily), `Week`, and `Month`.
|
|
* **Volume Type (`InpVolumeType`):** Allows the user to select between Tick Volume and Real Volume.
|
|
* **Candle Source (`InpCandleSource`):** Allows the user to select the candle type for the Typical Price calculation (`Standard` or `Heikin Ashi`).
|
|
|
|
## 5. Usage and Interpretation
|
|
|
|
* **Benchmark for "Fair Value":** The VWAP is often considered the "true" average price for the period. Price action above the VWAP is generally considered bullish for the session, while price action below is bearish.
|
|
* **Dynamic Support and Resistance:** The VWAP line itself acts as a powerful, dynamic level of support or resistance during the trading session.
|
|
* **Mean Reversion:** A significant deviation of the price from the VWAP often leads to a reversion back towards it.
|
|
* **Execution Benchmark:** Institutional traders often use the VWAP to gauge the quality of their trade executions. Buying below the VWAP or selling above it is considered a good execution.
|