This parameter is only active if the Tick Value Identification parameter has been set to the "Override" value.
Select the precision you would like to use in the calculations. Precision is the number of decimals to the right of the decimal point. If you entered a Tick Value of 0.001 you would want to set the Precision parameter to 3 (e.g., there are 3 digits to the right of the decimal point in 0.001).
Tick Value Identification
Tick Value (Override)