You could follow the paint dry system that Matt has touched on lately in his newsletters. It's a very slow system but keeps you out during the bad times. I think he said it would need to close the month out before it gives an exit if the conditions are still being met. 

Hello bulf = in tonight's newsletter I touch upon valid support/demand zones on the weekly charts - I would certainly prefer to see those remain intact.  Thus far, as you will see in the newsletter, they have produced a nice reaction.  It's anyone's guess where things go bigger picture - prognostications are of little value as they are fraught with errors.  The bullish view is price holds and rallies back up to new highs around the Sept/October timeframe BUT it's far too early to give it much credence at this stage.  401ks are best used to buy into valid weekly/monthly demand zones and then monitor price action and follow your exit plan.  Another option is to scale into declines at various levels IF you have time on your side (like 10+ years)