You can see this price level in the ACD Opening Range indicator which shows 873.50. You can now go long if you did not yet get long on the initial publishing of this chart.
Place your stop loss at 864.99 the low of the Opening Range also viewable in the ACD Opening Range indicator.
This trade setup still has merit if the price can hold support above the Daily Pivot Range. Look for a re-entry upon price strength through previous bar highs or new ATH breakout.
It's very common for collective market psychology to form strong support/resistance at these significant price levels such as $1,000. Hence with the double top forming I would be very careful at this level. The likelihood of the market failing to penetrate and follow through at this point is high and may require a retracement before it can garner enough momentum to plow through $1,000