Calculate Real-Time Stock Price Percentage Changes by Minute

The RTI_PriceChangePct_From_Min function in MarketXLS allows you to calculate the real-time percentage change in a stock’s price from a specified minute. It helps traders and investors quickly compare the current price against the price at any given time, all within Excel.

Why Use This Function?

• Helps you gauge intra-day price momentum by comparing the current price to a specific point in time.
• Useful for tracking performance around key market events (e.g., market open or news releases).
• Integrates seamlessly with Excel, making it ideal for quick calculations or incorporation into larger spreadsheets.
• Supports multiple time input formats (e.g., "HH:mm", "HH:mm:ss", or Excel date-time values as doubles).
• Delivers real-time data (when available) from supported data sellers, with minimal manual effort.

How to Use in Excel

Use the following formula format within an Excel cell:

=RTI_PriceChangePct_From_Min(symbol, time)

1. Enter the stock symbol as a string (e.g., "AAPL").
2. Specify the time in "HH:mm" or "HH:mm:ss" format, or use a valid Excel date-time format as a number.
3. Press Enter, and MarketXLS will fetch the required streaming data, returning the percentage change from the specified minute’s price to the current price (or latest available real-time price).

Parameters Explained

Example Usage

Basic Examples

1. Using a typical market open time:
   =RTI_PriceChangePct_From_Min("AAPL", "09:30")
   This calculates how much Apple’s price (in %) has changed from 9:30 AM until the most recent update.

2. With seconds included:
   =RTI_PriceChangePct_From_Min("MSFT", "09:45:30")
   Here, Microsoft’s price at 09:45:30 AM is used as a baseline for percentage change.

3. Using an Excel time serial number:
   • Suppose cell A2 contains an Excel date-time representing 10:00 AM.
   • You can reference this cell directly:
   =RTI_PriceChangePct_From_Min("GOOG", A2)
   MarketXLS will parse the time from cell A2 and return the percentage change in Google’s price from that time.

Advanced Scenarios

• Intraday Strategy Tracking:
Combine RTI_PriceChangePct_From_Min with other Excel logic to build a custom watchlist. For example, if the percentage change from the market open is more than a certain threshold, highlight that cell to identify potential trade triggers.

• Conditional Formatting with Real-Time Data:
Use RTI_PriceChangePct_From_Min in a conditional formatting rule. If the function’s return is above, say, 2%, Excel can highlight that cell green to signal a significant intraday jump.

• Referencing Other Sheets:
Place the time input in a different sheet or a named range, and reference it in this function to keep your workbook organized for larger analyses.

Common Questions and Troubleshooting

• “I’m getting an error that says ‘Invalid time format.’ Why?”

• Ensure your time string is valid. For instance, "9:30" should be "09:30," or pass in a properly formatted date-time or Excel serial number.

• “The function returns ‘No data seller is configured…’”

• Confirm you have at least one data provider (e.g., Zerodha or AngelOne) active in MarketXLS. Without a configured data seller, real-time data cannot be retrieved.

• “Why might results be unexpected outside of market hours?”

• Real-time data is only accurate during market hours or when your data seller provides after-hours data. Outside these times, updates may be delayed or unavailable.

• “Can I use this to fetch older historical data?”

• This function is intended for real-time or recent minute-level data, not for historical data from weeks or months ago. For extensive historical data, other MarketXLS functions may be more appropriate.

By leveraging RTI_PriceChangePct_From_Min, you gain instant visibility into how a stock’s price is performing intraday compared to a specific reference time. Whether you’re crafting quick formulas to monitor a few stocks or building sophisticated trading dashboards, this function integrates seamlessly with Excel for informed decision-making.