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e.g.
./script 1000 8000 5000 2000

ie: 
If the thresholds are 1000, 8000, 5000, 2000, then search each line fo
+r a threshold that is either
...
    -Greater than 8000
    -Greater than 5000, but less than 8000
    -Greater than 2500, but less than 5000

2011-09-12 10:20:54.473 hostname [13996,14019]: (WALL, MDConnection.cp
+p:420) Received data on Connection[OPRA-GRP13-16]. Pending=220. Total
+ Messages processed by Connection [OPRA-GRP13-16]=97190000