Most important thing that we all have to remember,Trading is very simple.Our minds being complicated is the reason why we try to over complicate a simple thing.So as in anything simple,we try to leave it as simple as we can.
There are various types of charts :
Line Charts,
Bar Charts,
Japanese Candlesticks Charts..........
Basically your preference,whatever you are most comfortable with.I personally use the Candlestick charts,because it makes it more visually obvious to me.I have to strain to see the same in a bar chart.But basically upto you....
Whether we take a bar chart or a candlestick chart,each bar/candle tells us of the Open,Close,High and Low of that particular time frame.Therefore,in a daily chart,the high is the high of the day.The close being the close of that day.But in a 15min chart,each bar represents the trade in a 15minute time frame,therefore the high of that bar is of course the 15minute high...so on so forth.
We have three trends :
UPTREND,DOWNTREND,SIDEWAYS TREND
UPTREND :An uptrend on a chart of any time frame is nothing but a series of higher highs and higher lows.
DOWNTREND:A downtrend on a chart of any time frame is nothing but a series of lower highs and lower lows.
SIDEWAYS TREND :A sideways trend is nothing but relatively equal highs and lows.
TRENDLINES :
An UPTRENDLINE is nothing but a line that connects two or more LOWS,in a chart in an uptrend.The more points that meet up to this line,the stronger this line is.This trendline acts as support,as prices blast off,then pullback to this line before taking off again.Therefore,in an UPTRENDLINE,the 2nd point is always higher than the 1st point,and the 3rd higher than the 2nd.
A DOWNTRENDLINE is nothing but a line that connects two or more highs in a downtrend.Once again,the more number of points that connect,the stronger the line is.This downtrendline acts as resistance.Each down move is followed by a pullback rally to this trendline which acts as resistance only to be met with more selling and lower prices.In DOWNTRENDLINE,the 2nd point is always lower than the 1st,and the 3rd lower than the 2nd.
A break in the UPTRENDLINE signals a possible change in trend.So too with the break in the DOWNTRENDLINE.