I use another indicator to record the floating spreads. It is coded by member of FF, here is the link
Spread Recorder @ Forex Factory. Just put the indicator in your expert>indicator folder. Open the chart you want to record the spread, attach to it.
From the expert file folder, it will create automatically a "Spread Recording" folder containing details of the spread, ask and bid price.
Here i attached the indicators and some example of spreads (FXCM) recorded.