MQL5 - How to make sure Array1 is always larger than Array2 for the last 20 bars

 
void OnTick()
  {

double SmallMA_Array[], BigMA_Array[];

int SmallMADefinition = iMA(_Symbol,_Period,21,0,MODE_EMA,PRICE_CLOSE);
int BigMADefinition = iMA(_Symbol,_Period,100,0,MODE_EMA,PRICE_CLOSE);


CopyBuffer(SmallMADefinition,0,0,50,SmallMA_Array);
CopyBuffer(BigMADefinition,0,0,100,BigMA_Array);

  }

Hi Everyone

I am new to programming and new to MQL5,

Can anyone help me how can I write to check if  

( SmallMA_Array[] > BigMA_Array[]  )  for the last 20 bars? 


Thanks in advance if anyone can help me.