Yes, you can. There are several options:
If your slider is static and has a known number of elements: you can simply create the number buttons and use the Go to Index Slider action for each button
If your data is dynamic, then you have a couple of options:
You can query the data and add the loop index to show the number. The to trigger the slider from the buttons you can use one of the following:
- Use the Go to Index action and pass in the loop index by pasting in the tag {loop-index} (I haven’t tested this last part with the Action, but in theory it should work if Cwicly supports it)
- As @JohnySvitana mentioned, you can use one slider to navigate another one, see the example from @Araminta: