Explain in detail

There is 2 stocks ; I Compute daily log returns below. Does the pair seem to be moving together? Do the correlations change over time as you observe it across 3 cycles? Is correlation a good measure to capture comovements?

I compute log prices . Below correlation. Does the pair seem to be moving together now? Does this pair seem to be a good candidate for pairs trading?

Correlation
cycle	Log Returns	Log Prices
1	0.88	0.91
2	0.86	0.79
3	0.85	0.98