About ranging market we may see here: Forex Market Conditions, a graphic depiction

1. Personally I am using MTF_AbsoluteStrength indicator with H1 settings for M5 timeframe: original thread with indicators, live trading results and images; how to use indicator (rules): read all the pages starting from this page till this one. The rules for ranging market is the following: if the indicator is showing uprend and downtrend in the same time so it is ranging market.

2. Besides i am using Ichimoku indicator but it is personaly.

Everybody may select any way to estimate the ranging or trading market.

3. Some people are using trendlines with support/resistance. The other people are using some moving averages indicators instead of support/resistance to estimate market condition.

4. Woodie's choppy zone indicator: many choppy zone indicators from Igorad; original thread.
Meaning of the color in some Igorad's indicators:
MediumBlue: Strong UpTrend.
Crimson: Strong DownTrend
DodgerBlue: Retrace UpTrend
Tomato: Retrace DownTrend
LightBlue: Choppy UpTrend
Orange: Choppy DownTrend
Aqua: Be ready to change UpTrend
Yellow: Be ready to change DownTrend

5. SideWinder for CCI: My first release: original thread by FX-Sniper.

6. Jurik Woodie CCI: indicators are here.

7. CCI Filter: original thread with indicators and full explanation.

8. Indicator That Isolates SIDEWAYS Market: original thread; small indicator's collection with images.

9. Evaluation of the market condition using six SMA indicators: original public thread.

And so on.
There are many other ways to estimate ranging/trending market or market condition.