Filling the gap?

We had a rare gap on the daily chart Sunday night and we have yet to fill this void. We might fill it this morning as the futures are at 1111.50 as of this writing. This market continues to hold its gains over the last couple of weeks and is doing so on lessening tick count which could signify a correction is in store as this would also be healthy for this market. Remember that this is also expiration week and expiration is typically bullish historically. We will see how this market reacts once numerous sell programs are initiated. We need to see some more ebb and flow before that happens though which would signify a change in the internals.