Regarding Tom DeMark trendline analysis, a swing point may not be obvious on the 15 minute chart, whereas it may be seen on the 5 minute and/or hourly charts. In other words, have a multi-chart view when looking for trendline breaks. Trendline analysis is just one of the many forex options you have at your disposal, as you are learning to trade forex.
Peter R. Bain
http://www.forexmentor.com