I do not see a 0.0028 to 0.0045 trading range
The trading range is derived from the price:volume scatter chart, which indicates that half of XMR volume ever traded was traded in that range.
0.0028 I see as a very strong support, then resistance and now support again, so I don't have an issue with the lower part of the trading range. I just do not see anything that special at 0.0045 in the charts. My take is that 0.0050 - 0.0058 range is a more likely place for the bears to make a stand. Furthermore the drop in XBT/USD, XBT/EUR etc since last summer would also tend to bias the trading range upwards.