This is an indicator to display the current TF on the chart. Its purpose is to show how to detect the current default TF:

/*           GetTimeFrame

   returns the number of seconds in the selected Timeframe:
 
      60       = 1 minute
      300      = 5 minutes
      3600     = 1 hour
      14400    = 4 hours
      86400    = 1 day    (24 hours)
      604800   = 1 week   (7  days)
      2592000  = 1 month  (30 days)
      31536000 = 1 year   (365 days)
            -1 = default TF (or non time-based TF)


   this indicator returns two values (commented out as it plots text)

      TF = 0 seconds
      TF = 1 minutes
      TF = 2 hours
      TF = 3 days
      TF = 4 weeks
      TF = 5 months
      TF = 6 years

      N  = number of units
*/

DEFPARAM DrawOnlastBarOnly = true
ShiftText = 1
Rge       = high  + averagetruerange[2](close) / 0.4 / ShiftText / 1
//
x = GetTimeFrame
IF (x MOD 60) <> 0 THEN
   TF = 0                         //TF = seconds
   N  = x                         //N  = number of seconds
   DRAWTEXT("#N# Sec", BarIndex,Rge,SansSerif,Standard,18) COLOURED(20,150,150,255)
ELSE
   IF x >= 31536000 THEN
      TF = 6                      //TF = years
      N  = floor(x / 31536000,0)  //N  = number of years
      DRAWTEXT("#N# Yrs", BarIndex,Rge,SansSerif,Standard,18) COLOURED(20,150,150,255)
   ELSIF x >= 2592000 THEN
      TF = 5                      //TF = months
      N  = floor(x / 2592000,0)   //N  = number of months
      DRAWTEXT("#N# Mth", BarIndex,Rge,SansSerif,Standard,18) COLOURED(20,150,150,255)
   ELSIF x >= 604800 THEN
      TF = 4                      //TF = weeks
      N  = floor(x / 604800,0)    //N  = number of weeks
      DRAWTEXT("#N# wks", BarIndex,Rge,SansSerif,Standard,18) COLOURED(20,150,150,255)
   ELSIF x >= 86400 THEN
      TF = 3                      //TF = days
      N  = floor(x / 86400,0)     //N  = number of days
      DRAWTEXT("#N# Day", BarIndex,Rge,SansSerif,Standard,18) COLOURED(20,150,150,255)
   ELSIF x >= 3600 THEN
      TF = 2                      //TF = hours
      N  = floor(x / 3600,0)      //N  = number of hours
      DRAWTEXT("#N# hrs", BarIndex,Rge,SansSerif,Standard,18) COLOURED(20,150,150,255)
   ELSE
      TF = 1                      //TF = minutes
      N  = floor(x / 60,0)        //N  = number of minutes
      DRAWTEXT("#N# Min", BarIndex,Rge,SansSerif,Standard,18) COLOURED(20,150,150,255)
   ENDIF
ENDIF
RETURN// TF AS "TF",N AS "Units"