If result big a number writie 'Orther' else Write cloum value

[sinanalmac]

I created A new table  the name is  FuTable .
The  futable  has  two  colums

"FU"  contais product name   and  it is unique

"MesaureDif"  contais  SUM(FuForecast[sales])-SUM(FUforecast[forecast]) .  it feeds from  FuSales table and it has FU colum  also    

FUTable  

FU	MeasureDif
A	10
B	9
C	8
D	7
E	6
F	5
G	4
H	3
K	2
L	1

I added  A Measure and determinate   Top  4  materilal 

Top 4 =  RANKX( All(FUTable);FUTable[MeasureDIF])

When I add     A new mesause  it doesnt work  

for example 

Measure = If(FUTable[TOP10]>4;"Others";FUTable[FU]) 
it is  not accept  FU table[FU]

When  I add a new colum . This time Formule  is not write "others " for smaller value  from  4

I just  want write "others"  for the product top4  value  less then  4