Hedging portfolio with total average ATR

So SPY is up a few points and volume is really high, but only towards the end of the day will we know how great volume really is.

So its not capitulation yet. Time to protect whatever gains I got from the gap up and hedge everything. How? adding up all the average ATRs of every stock and then the ATR of the stock you're hedging with and then multiplying by number of x100 shares.

So my total porfolio has a total average ATR of all 8 stocks x 1100 shares is 13.8
SPY is my hedging stock and its ATR is 3.3 so dividing 13.8 by 3.3 is approximately 4.2

So 400 shares of SPY would hedge, approximately, my total portfolio.

Here's all the stocks and SPY's charts and ATRs: (image is really huge)