It's just something I saw and keep in mind when market takes a dive. I've read it as red line = someone who buys the dip with 2x leverage, blue line = someone who buys SPY. QE ended but it seems like BTFD is still in effect.
I guess the job report is just right for the market. We got a strong headline number but wage growth was rather weak. If we got strong wage growth, probably would have caused yields to surge and it probably would have been a problem for equities.