Actually it can be the exact opposite. Sellers offer an obstacle by backing off on their offers causing price to rise on very soft volume because sellers are backing off and buyers have to bump up to buy.No, by "pressures" I mean those who are interested in buying vs those who are interested in selling. If sellers are offering few if any obstacles to buyers, price can rise on practically no volume at all. Today's activity in the NQ is a good example of this. What is most important to an increase in price is whether or not demand is greater than supply.
As for being harder to implement, that depends on how much one knows and how much of what he knows is untrue. If one starts off on the wrong foot, he may never get it. And many never do. Those who know absolutely nothing about charts and indeed may never have seen one have little to no trouble with this.
Nowdays interested buyers and interested sellers doesn't actually mean alot because there is so much illegal spoofing going on so the "wall" on a dom means less than what it used to mean as htfs make and pull offers and bids faster than a trader can say jimbo.
Price can rise because of increased demand. It can also rise on sellers backing away. And volume can stay the same, in both cases. The net effect is the same but the concepts are different. Actually today the sellers were probally backing off as opposed to buyers tripping over themselves forcing BO's

