Formula for continuously uptrend

I have written the following code to filter out stocks with it's previous 20 day's closing prices all above the 10 day simple moving average. I am kinda new, so I did it in a very stupid way. And it's also not working exactly right. If anyone can provide some help, I will really appreciate it. Thanks.

C>Mov(C,10,S)
AND Ref(C,-1)>Mov(-1,10,S)
AND Ref(C,-2)>Mov(-2,10,S)
AND Ref(C,-3)>Mov(-3,10,S)
AND Ref(C,-4)>Mov(-4,10,S)
AND Ref(C,-5)>Mov(-5,10,S)
AND Ref(C,-6)>Mov(-6,10,S)
AND Ref(C,-7)>Mov(-7,10,S)
AND Ref(C,-8)>Mov(-8,10,S)
AND Ref(C,-9)>Mov(-9,10,S)
AND Ref(C,-10)>Mov(-10,10,S)
AND Ref(C,-11)>Mov(-11,10,S)
AND Ref(C,-12)>Mov(-12,10,S)
AND Ref(C,-13)>Mov(-13,10,S)
AND Ref(C,-14)>Mov(-14,10,S)
AND Ref(C,-15)>Mov(-15,10,S)
AND Ref(C,-16)>Mov(-16,10,S)
AND Ref(C,-17)>Mov(-17,10,S)
AND Ref(C,-18)>Mov(-18,10,S)
AND Ref(C,-19)>Mov(-19,10,S)
AND Ref(C,-20)>Mov(-20,10,S)

You can write it as i do:
Filter:Barssince(cross(c,mov(c,10,s)))=10.
Good luck!