I think it is very well possible in the short term for a dip sub 18$ or even further (especially due to the current high growth selloff) to occur but over the next months, the strong fundamental track record and relatively cheap valuation compared to peers (+ higher growth rates) should catch up. Any dip under 15$ should be bough aggressively.
Price target 2021: 70$
April AUM: $3.2b --> Principal Value Traded (PVT) should be right around there, possibly a bit higher
PVT to revenue conversion rate is up 40% in april (assumed 1.125-1.25% in march)
so it should be around 1.7%-1.8%