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Volume profile is simply volume at price. No more complicated than that.
If you were to do it manually you will need the ability to export data from your trading platform. This will need to be at the lowest timeframe available to you to ensure the best accuracy. If you aren't able to export tick data, go for 1 minute data. But obviously the higher you go away from tick data, the less accurate you're going to be.
Once you've got the data in excel, price in one column, volume in another,...sort by price and add all the volume at each price together. If you're not using tick data then just choose one data point per bar consistently, ie open/close/high/low. Or perhaps the mid of each bar. Or perhaps use a range of price levels per volume bar. Up to you,...either way it will not be completely accurate without tick data but should be fairly representative. So if at price 1234 you've got 4 entries for volume, add those 4 entries together. What you're left with is price along the left with no repeating values and the corresponding volume.
Obviously you'll need to actually put some effort in to get the above right.
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