Diagram types and how to build them
There are 3 types of charts in MetaTrader 4:
- Line Chart
- Bar Chart
- Candlesticks
Line Chart
In order to build a Line Chart closing prices are used (for example minutes, hours, days and so on). Those prices are interconnected with straight lines. Forex forecast.
To make a chart of this type, one has to press the 
button of the “Charts” toolbar, accelerating keys of Alt + 3, the corresponding option of the Charts Setup window, or execute the “Charts — Line Chart” menu command.
Fig. 1. Line Chart example.
Bar Chart
Bar Chart is a diagram consisting of bars. Every bar contains the maximum price – high (upper point of a bar), the minimum price – low (the lower point of a bar), open price – open (line to the left of a vertical bar) and closing price – close (line to the right of a vertical bar) for the given period of time (for example an hour). Bar Charts are recommended to be used with 5 minutes or more time intervals. To make a chart of this type, one has to press the button 
of the “Charts” toolbar, accelerating keys of Alt + 1, the corresponding option of the Charts Setup window, or execute the “Charts — Bar Chart” menu command.
Fig. 2. Bar Chart example.
Candlesticks
Candlesticks Charts in comparison with Bar Charts are reflecting the real correlation between demand and supply on Forex displaying the winner of the fight between bears and bulls. Candlesticks provide more information about market situation as they display not only the direction of a price movement but its force too. To make a chart of this type, one has to press the button of the “Charts” toolbar, accelerating keys of Alt + 2, the corresponding option of the Charts Setup window, or execute the “Charts — Candlesticks” menu command.
Fig. 3. Candlesticks Chart example.