Build script with data with timestamps

I some excel with data, one is this:

Where there is a timestamp ( number) that represents yyymmddHHMM (yearsmonthsdayshoursminutes)

I have another Excel with the following shape:

And Im creating a code in matlab where I have to use this data. But im having issues when using the timestamps because in the secound one, I will have to take into account at what timestamp I got the data, and at what timestamp the program has to use it.

The problem then is that I dont know how to make a loop where:

For a certain timestamp Do certain matematical operation with the corresponding data of colum (B in the first excel) and colum(D) in the second on ( is an example).

I have tried to create a timedata arrow ( and I manage to do so with the following code) if true %TIME is a column array with the timestamps

    str=num2str(TIME,'%11d');
%TIME is a column array with the timestamps
dn = datenum(str, 'yyyymmddHHMM');
ds = datestr(dn, 'yyyy-mm-dd HH:MM');                                           % ‘Legacy’ Functions
TIMED = datetime(str, 'InputFormat','yyyyMMddHHmm', 'Format','yyyy-MM-dd HH:mm')   % ‘datetime’ Function
TIME=array2table(TIMED)
PRICETABLE(:,1)= TIME

And now I have the data in two vectors ( dont know if it is a good idea)

But now im not able to make loops.

Thanks in advance