What exactly doesn't work ?
The equation is a low pass filter for a series of values. Look at the bottom of this
wikipedia page, in english, the italian page doesn't show the equations.
How do you use it ?
Instead of the code in post #6 try this code:
Dim m_FilteringFactor, m_Value As Double
m_FilteringFactor = 4.5
m_Value = 0
m_Value = m_Value * (1 - m_FilteringFactor) + Values(0) * m_FilteringFactor
Don't use Float use Double, internally B4A calculates with Doubles..
You can use the NumberFormat function for the display.
You may also 'play' with the FilteringFactor.
Sorry, I don't speak italian.