This script is a TradingView indicator written in Pine Script. It creates an information box on the chart that provides details related to a trade, including entry plan, stop loss, take profit, and position sizing. Let's break down the components:
1. **Input Parameters:**
- `entryPrice`: The entry price for the trade. This is a manually input value, and the default is set to 100.
- `smaLength`: The length parameter for the Simple Moving Average (SMA) calculation. Default is set to 20.
- `smaMultiplier`: The multiplier used to calculate the stop loss and take profit based on the SMA. Default is set to 1.5.
- `riskPerTradePercent`: The percentage of risk per trade as a decimal. Default is set to 2.
- `capital`: The total capital available for trading. Default is set to 10,000.
2. **Calculations:**
- `smaValue`: Calculates the Simple Moving Average based on the closing prices with the specified length (`smaLength`).
- `stopLoss`: Calculates the stop loss level by subtracting the product of the SMA value and the multiplier (`smaMultiplier`) from the entry price.
- `takeProfit`: Calculates the take profit level by adding the product of the SMA value and the multiplier (`smaMultiplier`) to the entry price.
- `riskPerTrade`: Calculates the actual risk amount per trade based on the specified percentage of capital.
- `maxQuantity`: Calculates the maximum quantity of shares or contracts that can be bought based on the specified risk percentage and the difference between entry price and stop loss.
- `buyValue`: Calculates the total value of the position based on the maximum quantity and entry price.
3. **Info Box:**
- `labelBox`: Defines a label box on the chart.
- `label.set_xy(labelBox, bar_index, high)`: Sets the position of the label box to the high of the current bar.
- `label.set_text(...)`: Defines the text content of the label box, providing details on the trading plan, entry, stop loss, take profit, capital, risk per trade, maximum quantity, and buy value.
Overall, this indicator is designed to provide traders with key information related to their trade plan, risk management, and position sizing directly on the chart. The displayed values are formatted with three decimal places for clarity.