Is Petroceltic correlated with Natural Gas?

Petroceltic is a British company specialized in finding new natural gas resources. On the graph of our left we can compare its price with an ETF which tracks the Natural Gas price. We see 3 parts: 1. With expensive Natural Gas, the correlation was very clear (almost a flat black line). 2. With cheap Natural Gas, second rectangle, we appreciated no correlation (black and red lines follow one another). 3. Lately we saw some irregularities that seemed to have passed to continue on stage 2.

So, probably, if we see a higher price for natural gas, we may find a flat black line showing correlation again. It makes sense: when the price is expensive, it´s more important that the company itself.