What indicator is best for gaging the volatility of a swing?

Some swings in prices are more volatile and sharper than others, which includes a sudden reversal, compared to a swing where price 'crawls' away from the low or high with less volatility. So, although you can use your eyes to try and see this, is there an indicator which can help deceiver which swings are more volatile than others when comparing them in a more black and white sense.

Many thanks.

Maybe you could use ATR for this? (though this ignores Close-Close ranges.

Though MA's are still good for indicating the strength of a move (AFTER its established some momentum).

Try a currency meter. While the signals are too slow to use for entering and exiting, they give you a general feel for price direction. If two pairs are low in value, the candles will likely be small and often consolidating. If there is a large difference, you are probably in a breakout condition. If there is a moderate difference, then you will probably have a ranging market within an overall trend. Nothing is guaranteed, but it is good general information. You can also consider multiple time frame analysis. A trend is a range on a higher time frame, so if you are a range trader, it is not very difficult to see reversals. Good Luck.