Here is a comparison of CRON; CGC/WEED, APH/APHQF and ACB/ACBFF There is a pretty strong correlation going on.
I put the US tickers up because, going in to the Oct. 17, 2018 legalization date for Canada, I think that the options for CGC and CRON will have a lot of torque and the expiry is Oct19'18 so you can capture the event +2 days. There are Canadian options for most of these on the M-X.ca but they are illiquid. CRON and CGC have decent option markets: open interest, market makers and spreads. Volumes are still kinda low so playing the event a few months out should afford you enough time to actually accumulate a reasonable position.