I took a step back this week and looked at a longer view than I normally do.
The following is the weekly SPX close since 1990 with both an 88 SMA and an 88 EMA. I can’t think of a signal simpler than selling when price crosses down through the MAs (green arrows) and buying when it breaks up through (blue arrows). As of 2 weeks ago, SPX has once again broken down through the 88s:
| Date | Close | 88W SMA | 88W EMA |
| 7/26/2011 | 1292.28 | 1196.73 | 1217.94 |
| 8/2/2011 | 1199.38 | 1197.96 | 1217.53 |
| 8/9/2011 | 1178.81 | 1198.78 | 1216.66 |
| 8/16/2011 | 1192.76 | 1199.76 | 1216.12 |
