I use an RTH 5 minute mostly to see the prior day's important levels (high, low, close) ... but for both the el loco speedo and the MM trades, I work off 24 hour data - especially when things are this volatile. When things are more nap-like, then the RTH can yield some MM set up's, especially when there are gaps. I am flat - took the last off at the RTH gap fill. I usually take my overhead cost target (+4. +10, +20) depending upon current 5 minute ATR , and then use prior high/low/close, and the 23.6 and 38.2 extensions. Sometimes I'll hold for the 100 or more, but rarely. I end up giving more back than I get over time by getting greedy. But we are getting close to it today, which means I'll have left about 20 points on the table.
And why should we believe you, Chicken Little? Ye of the "The floor is holding, the floor is holding!" hysteria.
And if you look at that RTH I posted you can see how the PA back through the prior close would have given confidence in the first cross 1500 el loco speedo ... it all works together very well. I admit it helps to have multiple monitors so you are not constantly flipping through looking for charts.