Let's imagine you want to show a chart where you have orders (like they come in over the days...) and their order volume. You want to show a chart with a trend line to see how oder volume develops over time. You want to filter the orders by different creterias...
So for this to happen you need a numeric value you can put on the X axis. This can't be the order number (because it might not just be an ascending number), it can't be the date, or anything else, it must be something like an index of the actual result set (so the filtered data set, like "This was the first order coming in, this was the second, ... all based on the actual filtering). DAX formulas like RANKX or RANK.EQ don't seem to help, the index always needs to be based on the actual filtering without any gaps...
Any idea how to solve this?