RE:Wait & see game is getting old I agree with you. I'm not sure what you deem substantial, all I can say is that I'm overweight in MDX based on it's performance at this point in time. I think I will need to re-evaluate at the end of the year to decide how much I should continue to hold.
Things I need to see in 2019 to continnue to hold a significant number of shares.
1) Regulatory clearance from Brazil's version of the FDA for derm secure plus an agreement to purchase a minimal number of devices- resulting in cash going to Med X
2) Regulatory clearance for Mexico
3) Revenue from the Netherlands program
4) Revenue from the Spanish program
5) Revenue (not just an agreement or pilot) from a Canadian or American partner/customer
DermSecure was announced (Not sure we can say launched in September 2018) Anything less that that would be a disappointment.