One of the indicators I use occasionally is called Guppy Multiple Moving Average (GMMA) For more information about this indicator, you may read daryl guppy's book - Trend Trading
According to guppy, there are two groups of people trading the market, the short term traders and the investors who usually are long term oriented. These two groups are represented by moving averages, the faster moving averages representing traders while the slower averages represents the investors
In an uptrend, the faster moving averages will cross the slower averages from below and remain above the slower averages, the reverse is true for down trend.
This indicator is useful but should not be used alone