If a close look at this chart suggests to you that someone is inflating US financial asset prices you might very well be right.
Except for hedges and scalps I would not even consider shorting this market until it breaks the obvious trendline. I'd be willing to miss the first 10 percent of a down move to catch the meat of it, and not exhaust myself trying to anticipate a correction. Only amateurs make calls and chase 'bragging rights.'
At the same time the 200 week moving average has proven to be formidable resistance in the last rally, and so I would not feel comfortable taking determined longs here either. The average holding time of a position in this market is literally less than a minute, so the potential for another 'flash crash' seems rather high.