For me, the VIX will need to get back down to between 14 and 15 then form a base, which could co-incide with SPX testing its previous high of 1,422.
One thing that can be said about the VIX (just by observing the chart above) is that gaps do get filled and there us a nice gap (circled) between 16.5 and 18. The only question is whether it gets filled prior to going down to the 14-15 range or after. I'd suggest the latter, such seems to be the renewed mood of 'optimism' running through the market!
And here's the VIX with SPX overlay. I can't count waves to save my life but a traditional double top at 1,422 certainly looks plausible!