The autocorrelation with lag zero always equals 1, because this represents the autocorrelation between each term and itself. Price and price with lag zero are the same variable. Each spike that rises above or falls below the dashed lines is considered to be statistically significant.

What is a good value for autocorrelation?

An autocorrelation of +1 represents a perfect positive correlation, while an autocorrelation of negative 1 represents a perfect negative correlation. Technical analysts can use autocorrelation to measure how much influence past prices for a security have on its future price.

What does an autocorrelation of 0 mean?

Summary. Autocorrelation, also known as serial correlation, refers to the degree of correlation of the same variables between two successive time intervals. The value of autocorrelation ranges from -1 to 1. A value between -1 and 0 represents negative autocorrelation.