First you have to get a list of upcoming earnings announcements. Then you delete low priced stocks as well as those where you don't want to deal with assignment if things blow up (GOOG at $1,200 anyone?). Next, remove those whose average IV trades below a certain threshold (low beta stocks) because there won't be much IV expansion in them. The next stop is a look at the EOD option chains, one by one. If the B/A spread is Holland Tunnel wide, it's on to the next stock.
After awhile, you get a feel for what will be in the ball park. If you find one, plug the option quotes into the option program. At the same time, look at the IV chart at IVolatility to see what previous contractions have been and also look at the option chain again, using both to derive a guesstimate of where IV will contract to. Now it's back to the program and see what the graph looks like. If the ratio is close to 3:1 then enter that lower post EA IV guesstimate and see what the graph looks like for the morning after the EA.
If that R/R and is still attractive, it's time to set up orders on the platform.
An Iron Condor can be set up as a single trade, as a pair of verticals and as a pair of strangles. Diagonalizing just changes the type of combo order. The obvious step is to place the IC order at your desired price. Maybe it's just my experience but better fills on 2 legged combos occur far more often than on those with more legs. Because people often bid one combo up (or down), you can often leg in for a better price.
Because the body sells for much more than the wings cost, if working via the strangle entry, work the body for a better fill because there's less to be gained from working the wings strangle.
Now price moves during market hours. So that means setting price alerts on each combo and then as prices change, triggering the price alerts, they all have to be reset again and again.
And no, I don't know much about the Greeks, nor did I care. This was all about a price set up. It was either there or it wasn't.
By now, are you sorry that you asked

? Are you as tired of reading this as I am of all of the effort that went into this process? Perhaps someone with the technology to make this a more efficient screening process could make an easier go of it but after many years of doing this, I have moved on to less time consuming adventures since I no longer need or want to be as aggressive as I was when I was a mere lad

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