I think ATR may be good for you.
But if you are looking for doji ("Japanese candlesticks" by Elder) so there are 2 indicators about it:
The last indicator is giving the doji to you (doji is the candle where open and close are equal) as a blue dot. The theory behind this is here and here. And this article may help.
MetaTrader Trading Platform Screenshots
EURUSD, M15, 2013.05.28
MetaQuotes Software Corp., MetaTrader 5, Demo
"Japanese candlesticks" mainly explain the pattern of the price. ATR tell you the average range of the price.
I think ADX will be good for you too. Or you can just calculate the standarddev of price. They would tell you the strength and deviation of the market.
Just very small video about doji - video is accompanying by text so we can just read the text: