Here is a ridiculous example. On January 15 the USDCHF price fell dramatically. Using the default periods of 12,26 it takes 12 bars until this price change shows up on the histogram and then after 26 bars the old data is finally entirely processed. I have set the smoothing of the (the signal) to period 2 and used not , to make this effect visible, but is happens anyway.
Having this knowledge I can place this old data from the January price fall anywhere on the chart. I can make March 20 start to look like an uptrend by changing the fast period to 46 (this is then day 46 since January 15) . Or I can do the same and make April 15 look like as if the price will go up there, although it is the old data from January....
Conclusion: Don't use high periods on indicators, especially on oscillators like the . Even the default periods are way too slow and show up 12 bars later, which means 12 days later on a and then it takes until bar 26 (26 days later) until the old data is removed.
P.S. Here is another example. I can make the glitch as long or short as I like:
and I can move it anywhere I like