Aroon Up & Down - this MetaTrader indicator is based on finding the maximums/minimums of the period and doesn't use standard MT4 indicators. It is a separate window indicator with 2 charting lines. I find it useful to determine the trend changes.

BB MACD - a MACD variation custom MT indicator, based on moving averages and standard deviation indicator. It can be used to determine trend starts/ends as well as the trend strength (the broader is the gap between two bands, the stronger is the current trend).

Beginner - this one shows up trend extremes (max and min) which can be treated as the support and resistance points and help you understand current trend channels. It is a simple indicator that uses some period to find most high and most low points and mark them with the dots. It can be a good base for your own range breakout expert advisor.

Laguerre - a separate window indicator with one line signaling short and long positions, when it crosses the upper band from above or lower band from below, respectively.

RSIOMA - this indicator is composed of the two RSI's (Relative Strength Index) of the moving averages. The cross of the RSI's mean the change of the trend - when bold one is above it is an uptrend, when thin one is above it is a downtrend.

Var Mov Avg - indicator is based on the calculating of moving averages of the varying periods. It detects crosses that produce buy/sell signals as well as current trend indication. This indicator has a sound alert on signals, which can be turned on and off.