Well, get in the habit of referring to it at S/R, they're one in the same. It's just a level that exerts pressure on the price. Think of it like gravity of planets or moons. It will either come in too slow and stop at S/R or or will come in flying and slingshot past it going out as fast as it came in...or just come in at normal speed and find an "orbit" around it until something disrupts it and sends it flying on one directing or the other. And remember, it's not the price that exerts the pressure, but the behavior of traders at that price.
The price approaches it, and more people decide it's a good pivot as you get closer (whether delta hedging or just "I think this is fairly valued at..."). Watch for it to happen at option strike prices (for example 350 will see more price action than 353.47...for both the individual retail decision and the professional hedge).
S/R isn't a level that holds inherently for price, it's a level that confirms and reinforces signals, towards which prices will tend, or defining a range that movement outside of represents a likely move out of the "orbit" and continuation away from S/R.