Maybe I'm wrong but I see this strickly as a liquidity issue as there is always someone somewhere who wants out of the market at any one time. If you have good volume of trading (for Noront that's 800K plus a day) there is liquidity and no problem dropping 10K shares without dropping the share price. Low volume and you get either sharp price increases or drops both of which are distorted by low volume.

Secondary is the issue that day traders will not enter into buy sell if they can't see high enough volume to quickly exit their position. Some hate day traders but they can actually help by increasing liquidity.

The above is nothing to be concerned with once news comes out and much higher trading volumes come on.