I guess you can check MA (moving average), which measures the average price of the previous n-periods. For instance, a MA(5) measures the average price of the last 5 bars.
The moving average explained above is called simple moving average (SMA). However, there are also other popular types of moving averages: exponential moving average (EMA) and weighted moving average (WMA). The only difference between the SMA and the other two approaches is the weight assigned to each period. EMA´s and WMA´s assign more weight to the periods that are closer to the current price, while in SMA all periods are equally weighted.
Usage of Moving Averages
Usage No. 1 - As stated before, MA´s are trend following indicators. They smooth out price fluctuations and make it easier to identify a trend. There are several ways in which this indicator can be used to identify the trend:
1 - Location of the MA in relation to price action. If the MA is above the price, it indicates a downtrend is in place. If the moving average is below the price then it is considered an uptrend.
2 - With the slope of the MA. When the MA is sloping up, the market is considered to be in an uptrend. When it is sloping down the market is considered to be in a downtrend. When there is no slope (close to a flat line), then the market is trendless or sideways
Usage No. 2 - MA as support and resistance. Some MA’s are used to establish levels of support and resistance. The most common periods used in MA for this kind of usage are: 50, 100, 200, 144, 89, and 34.
Usage No. 3 - Moving averages as cross-over signals. Perhaps the most common and easy trading system is this one. It consists in plotting a short period moving average and a larger period moving average. When the short period moving average crosses above the large period moving average, it signals a buy signal. When the short period MA crosses down the larger period moving average, it indicates a sell signal.
To read more you can check here.http://www.straightforex.com/courses...view.php?id=76
By the way it's not my site, but just a web site where I visit for tutoring myself.