Coding for crossover of two SMA lines 21 and sma 10

Can anyone help me with code for sma 21 crossing- sma 10 …

( Buy script and Sell script)…

Thanks in advance…

NaMasTe TraDeR,

BUY SCRIPT:

CROSSOVER(SMA(CLOSE,10) , SMA(CLOSE,21))

SELL SCRIPT:

CROSSOVER(SMA(CLOSE,21) , SMA(CLOSE,10))