Using If else conditions on Vectors

I am having issues with the following piece of logic. Basically i have a dataframe of stocks for MS and Apple. I want to excute buy and sell conditions based on certain price comparisons. But R does not allow me to use If Else conditions with vectors how do i overcome this scenario

if (mydatastocks$MS<120){
  if (mydatastocks$MS>110 & mydatastocks$MS<120){
    print("buy small")
  }else{
    print("Buy Huge")
  }
} else{
      if(mydatastocks$MS>120)
      print("Ignore")
}