There is one really important element that you should always start with in forex - prices are not continuous and in fact they are primarily discontinuous. What I mean be that is that prices leap quickly between level and don't gradually move up in a trend. If you understand that principle alone you will make money. Trend lines are of no use what so ever and can be misleading. The real key is to understand the concepts of pivots, support and resistance. Then you will get a grip of how the price leaps around and then you will start to see a relationship with time. It will also lead you to Gann and the concept of vibration. I hope that helps.
