Q: Are these stocks OK to average into currently or would you wait for a better initial position price?

Q: Team, I have holdings in all three and although I have done great with BDX over the years, it seems to be struggling. I am thinking of selling but would like your comments on increasing my holdings in SYK and ISRG or would you provide insights another option. All three stocks are in my non registered account.
By the way, because of your insights on AMED of a few years ago, I sold the stock and purchased GOOG.............it was a great move
I have whittled down my holdings to 15 stocks and want to be careful adding more

Q: Due to the low volume, is it ok to buy ISRG on the neo exchange?