The technical charts on this site use candlestick bars to represent the change in price during each time interval. Candlestick bars allow you to quickly view a summary of what happened during the time period, the shape and color of the bar represents the open, close, high, low and direction of the exchange rate for the interval.
The thick part of each bar represents the difference between the opening price and closing price for the interval, if the price closed above the opening price then the bar is blue, or when the price closed below the opening price the bar is red.
Also if the high and/or low price during the period is outside the range between the open and close then this price is shown by the thin line at the top of bottom of the bar.
Note that the bars look the same regardless of whether they represent long or short periods.
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The charts are real-time with the timezone set to New York (EST).