I avoid buying straight out-the-money options. They offer little room for forecasting error. Especially with non-trending underlyings (like indices on daily charts), directional plays with otm options have a lower probability of success. Currently I am also bearish on SPY / SPX, but I'd prefer to buy the 133 or the 134 puts. Their implied volatility is also better, 10.4 and 10.7% vs. 12.4% due to the "IV smile" (1 year IV range: 9 .. 15%, 3 month IV: 9.5 .. 12.5%).
I suggest reading Grob109 and Scientist's posts about SCT on this thread . You might get something to use for your trading method.
add another short. sell-limit: 1316 Stop: 1321 Not sure if the market will go there but a bounce would be nice.