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Referencing prior rows and multiple columns in a calculation

I have a dataframe that looks like the below. You can see that, to start, the SMA column is a duplicate of the Index Value column intentionally. I’m trying to adjust the SMA column so that it will be the result of a simple calculation, something to the effect of the below, which I believe would require a loop of some kind:

Referencing prior rows and multiple columns in a calculation

I have a dataframe that looks like the below. You can see that, to start, the SMA column is a duplicate of the Index Value column intentionally. I’m trying to adjust the SMA column so that it will be the result of a simple calculation, something to the effect of the below, which I believe would require a loop of some kind:

Referencing prior rows and multiple columns in a calculation

I have a dataframe that looks like the below. You can see that, to start, the SMA column is a duplicate of the Index Value column intentionally. I’m trying to adjust the SMA column so that it will be the result of a simple calculation, something to the effect of the below, which I believe would require a loop of some kind:

Referencing prior rows and multiple columns in a calculation

I have a dataframe that looks like the below. You can see that, to start, the SMA column is a duplicate of the Index Value column intentionally. I’m trying to adjust the SMA column so that it will be the result of a simple calculation, something to the effect of the below, which I believe would require a loop of some kind:

Referencing prior rows and multiple columns in a calculation

I have a dataframe that looks like the below. You can see that, to start, the SMA column is a duplicate of the Index Value column intentionally. I’m trying to adjust the SMA column so that it will be the result of a simple calculation, something to the effect of the below, which I believe would require a loop of some kind: