$BTW fell below the 1.9 level.
Let's use this figure to talk about key price levels.
Common ways to confirm a breakout include closing on the other side of the level, failing to move back below it on a retest, and increased volume as the level is crossed.
Volatility can increase near key levels, so leveraged traders should leave more room here. Stop-losses placed too close to round numbers can easily get swept.
The same reading can mean very different things in different market conditions, so don't blindly apply a single rule.