Autocorrelation peak

1. What is a good autocorrelation score?
2. Where does the maximum value of autocorrelation?
3. What does a peak in cross correlation mean?
4. How do you interpret an autocorrelation plot?

What is a good autocorrelation score?

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.

Where does the maximum value of autocorrelation?

The AACF of a surface signal has three properties: (1) symmetry, R(τ_i, τ_j) = R(τ_{− i}, τ_{− j}); (2) the maximum value is at the central point; and (3) similar pattern and periodicity as the surface texture.

What does a peak in cross correlation mean?

The cross-correlation plot typically produces two peaks: a peak of enrichment corresponding to the predominant fragment length (highest correlation value) and a peak corresponding to the read length (“phantom” peak).

How do you interpret an autocorrelation plot?

If autocorrelation values are close to 0, then values between consecutive observations are not correlated with one another. Inversely, autocorrelations values close to 1 or -1 indicate that there exists strong positive or negative correlations between consecutive observations, respectively.