Scan for Relative strength

Hi Pete, thanks for all your videos and your scripts.

I want to check for relative strength of a stock with SPY on daily basis.

I was the stock to out perform the index  (for today)

is this code correct as i get some results which are not  outperforming and some are outperforming

input CorrelationWithSecurity = “SPY”;

def close2 = close(CorrelationWithSecurity);

def RS = if close2 == 0 then 0 else close/close2;
#RS.setDefaultColor(GetColor(6));

#def startDate = DaysFromDate(referenceDate) == 0;

#addchartbubble(startDate, RS, “Start”, color.RED);

def sr = CompoundValue(“historical data” = RS, “visible data” = if isNaN(sr[1]) then RS else RS[1]);
def SRatio = sr;

#plot Scan = RS[1] < SRatio[1] and RS >SRatio;

plot Scan = lowest(RS -SRatio,1) >0;

Thaks,

Raviraj