Tab Stops in InDesign Tables
is there a way without using indent to align table text in a column on "," or "."
Absolutely! InDesign's tables are sneaky because they pay attention to tab stops even if you don't have a tab character in there.
For example, you can just select a whole row in a table, open the Tabs palette (Command-shift-T/Ctrl-Shift-T), click the Decimal Align tab stop, and click in the palette's ruler. This ensures that all the decimal points in that row will align -- again, even if there are no tabs at all in the cells!
Before: No tabs in the cell
After: Decimal tab stop aligns the numbers properly
If you're in Europe and want to use commas instead of points, select the tab stop in the Tabs palette and change the Align On field to a comma.