Hi Keith,
Without the context of instrument and timeframe, I can't comment on the figures you provide I'm afraid.
For a good article explaining what ATR is, read this:
The Average True Range Indicator
It's primary use is to measure the volatility of an instrument which, in turn, is a useful aid to deciding on an appropriate position size. For more on this, check out this article:
Position Sizing as an Approach to Risk Management
Tim.