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Understanding the math.round_to_mintick() Function in Pine Script

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This article provides a detailed tutorial on how to use the math.round_to_mintick() function, ensuring your scripts handle price data accurately and efficiently.

Syntax and Overloads

The math.round_to_mintick() function is straightforward in its usage and comes with two main syntax forms:

  1. math.round_to_mintick(number) → simple float
  2. math.round_to_mintick(number) → series float


  • number (simple int/float): This is the value you intend to round. It can be a single number (simple) or a data series (series), depending on the context of your script.


  • The function returns the input number rounded to the nearest value divisible by the symbol’s minimum tick size (mintick), without any remainder. When the function encounters a tie, it rounds up to the next mintick.


A key point to remember is that the function returns ‘na’ (Pine Script’s notation for “not available”) for ‘na’ input values. This ensures that your script’s logic remains intact even when dealing with missing data points.

Practical Example

Let’s delve into a practical example to understand how to use the math.round_to_mintick() function. This will include modifying variable names for uniqueness, as per our objective to provide a comprehensive learning experience.

indicator("My Round to Mintick Example", overlay=true)

// Sample price value
samplePrice = close
roundedPrice = math.round_to_mintick(samplePrice)

// Plotting
plot(roundedPrice, "Rounded Price", color=color.red)

Detailed Walkthrough

  • math.round_to_mintick(number): This function is used to ensure that the price or value you’re working with adheres to the precision dictated by the trading instrument’s minimum tick size. It’s particularly useful in scripts that generate price levels, such as entry or exit points, to ensure these levels are actually tradable on the platform.
  • samplePrice = close: Here, we use the closing price of the current bar as our input number. This is a common practice in trading scripts, where the current price is often a reference point for calculations.
  • roundedPrice = math.round_to_mintick(samplePrice): The rounding operation is performed on samplePrice. The result is a price value that’s aligned with the instrument’s mintick, ensuring it’s a valid price point within the market’s trading rules.
  • plot(roundedPrice, "Rounded Price", color=color.red): Visual representation is key in trading. Plotting the rounded price allows traders to see how this function can affect trading decisions directly on the chart.

Key Features and Takeaways

  • Function Usability: math.round_to_mintick() is essential for creating scripts that work with price levels, ensuring compliance with market rules.
  • Syntax and Application: The function’s syntax is simple, yet it supports both single numbers and series, making it versatile for various scripting scenarios.
  • Handling ‘na’ Values: The function’s design to return ‘na’ for ‘na’ input values ensures that scripts can handle missing data gracefully, preventing unintended errors.

By integrating math.round_to_mintick() into your Pine Script tools, you enhance their precision and reliability, ensuring that any price-related calculations align with the actual trading environment’s requirements.

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