# How do I understand the Put & Call Impact chart in Equity Hub™?

After choosing a specific stock or index, you can choose to see both the **put and call impact** broken out separately, showing the rate change of gamma in these curves. Essentially what this is telling you is, the more steep or vertical this line is, the faster gamma is changing which tells us that we should expect more volatility at these prices until the curve starts to flatten out again.

Overlaid on these curves are these two sets of bars which show Gamma by strike for calls in orange, and Gamma by strike for puts in blue for all expirations. The smaller subset of bars inside show Gamma for the next expiration only. This can show us exactly which strikes have big expirations relative to how fast Gamma is changing.

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