How do YOU think Melon chart positions are calculated exactly?

By throwing darts at a dartboard?

Normalize 1h and 24h ULs to [0,1] dividing by the max value.

Then do the same for downloads.

Then multiply streaming by 0.4 and downloads by 0.6.

Then add them.

Then sort.

Alternative method:

Put the songs on pieces of paper.

Throw them up.

Catch them.

Rank in the order you caught them.