Volatility compression and Boll% Indicator

Here you find a list of Dax30 Stocks with a volatility compression pattern NR4 at Wed May 6th .

You find also the Boll% value, which gives the stock position respect to the Bollinger Channel.

Why this? Have a look to MRK, whose Boll% is 0.38.

I have no need to look at the chart to know that the stock is under the center of the Bollinger Channel.

This information could be very useful to time for example a long trade on MRK.