Buy on Tesla dip?

I have a modest position in Tesla (TSLA), which is expected to droop dramatically at the open due to unmet "expectations" following a respectable quarterly report. I'll watch it after the open. If it settles with a 10% drop or more, I'll consider doubling down on my position. That's money I could also throw at the Twitter IPO, but the over-pricing and uncertainty of the Twitter IPO means that it is now less attractive than buying TSLA on the dip.

-- Jack Krupansky