spx500 is at a very very high price so any selling opportunity is good (...if it is a good one with reasonable money- and risk.management)
dont rikt more than 1% of your account in the stopploss. calculate your lot size correctly.
if you feel this trade will give you too few money even if it hits the takeprofit level, then your trading account is simply to small. face the fact and dont overtrade!
or enter a short after some bearish price action.
there was formed another double top from which you may calculate your profit targets and next entrys for more sell
based on 4h timeframe double top
and 0.618 retracement.