The so-called "money line" is not a major line at all. It is usually a branch from the fate line (the vertical line in the center of the palm) that runs toward the Mount of Jupiter — below the index finger. A well-marked Mount of Jupiter (fleshy and firm) is also considered a sign of ambition, leadership, and by extension, wealth.
Some traditions read a deep, straight fate line as a sign of career success; stars on the Mount of Jupiter as sudden fortune; and a long, well-proportioned index finger (the Jupiter finger) as authority and financial acumen.
None of this has been shown to predict anything about future income, inheritance, or entrepreneurial success.


