Ultra Trend is one of the well known indicators made for MetaTrader 5 now.
The way how Ultra Trend is calculated is simple:
Even though at the first glance it seems that such an indicator will lag a lot, it is not the case, and it is rather useful for trend determination.

Vortex - smoothed
Vortex indicator (based on the article that was published in the January 2010 issue of TASC) with a smoothing option.
Dynamic Pivots
Based on the Austin Passamonte's idea, this indicator calculates intra-day pivots.
Triple Jurik Smooth
Jurik smoothing is very responsive to price changes, is very smooth and it makes it a very good candidate for this type of trend assessment.
PowerSystem
Implementation of Alexander Elder's power system indicator, it will show the price trend and trend reversal.