I'm not familiar with what the data is telling you. Is it number of events that the knock sensor is sensing? If so, then it might be almost worthless data, if it's pre-processing by the ECM. It could be phantom knock or noise that is filtered out by the ECM and not true knock.
Do you have the ability to see feedback knock correction (real time) and/or fine knock learning (long-term correction due to repeated knock events at specific load/RPM values)?
FKC and FKL, along with fuel trims (short and long-term) are the things I'd be looking at most to give you a heads up on the most common issues, such as fuel, leaks, etc.
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