Seems like Tesla is starting to become oversold in the 1H and 1m chart which means we might see a huge spike upwards soon. We still have a tiny bit left in the 1D chart before the stock will have reached its top. Now if we make some research on companies joining S&P500 like Yahoo did in December 1999 we could see Tesla doing the same, we might not see a huge downwards movement at all but instead a higher demand for Tesla shares. However many negative catalysts remain uncertain for many investors/traders such as the unemployment ending around the end of December. This means that we could still see a posibility of a smaller/mid downwards movement before a recovery. If that happends and Tesla being one of the 10 biggest companies to join the S&P500 in such a short time span it could mean that the entire market could tank for a good 2 weeks perhaps?
I would trade with caughtion and smaller position size arounde the current price levels until after Tesla has joined S&P500 to know where exactly the stock will be heading in the next year.
Do no take this for financial advice, this is all but speculation.