Hopper provided this diagram showing his relative price and money flow oscillators. Here is his commentary:
Attached is a picture of 2 oscillators for the SPX, the darker line is a relative price oscillator, the orange line is a oscillator.
The data is current to May 12th closing. One can see the darker oscillator broke higher and met resistance as today's market shown.
The orange is still under water.
Until the price oscillator changes its resistance levels, it doesn't look bullish to me.