S&P 500 tests 1840 once again, levels to watch The index is near 1840, a now familiar level to traders as the index has oscillated between 1840 and 1880/90 now for more than a month. A breakdown below 1840 would see next support at 1836.25. Resistance is at 1847.61. A move below 1840 that stopped at 1830 would just mean the existing range has been slightly expanded, just as 1890 was an expansion of the 1880 band which proved short-lived. Today is in many respects an inversion of yesterday's trading day, but without any real signs of panic with the exception of certain names, such as Pandora (P), where there are big give-ups.