Trend lines are drawn on charts to help predict the general direction of price.It also help to determine good entry and exit point.they also help to see the reversals.
A trend line is a line that shows you prices or trends where the market moves the turning point of the line where prices become high is the resistance and the turning point of the line where the price drops is called support so that basically shows which market trends are moving. Trend lines are formed when diagonal contrast can be strained between two or more value rotation points. They are usually used for official messages and leave asset time when trading securities. This can also be referred to as the nation's merchandise because it was first used in the Netherlands.