//@version=3
study("Cur_sym Relative Strength vs Bitmex Alts", shorttitle="CUR_SYM RS VS MEX",precision=4)

len1=input(title="ema security length", defval=21)
res = period
curSymbol = tickerid 
hline(0, title="Zero", color=orange, linestyle=dashed)

// //Relative strength calc
// RS(series) =>
//     c = close
//     c1 = close[1]
//     result = (c-c1)/c1

//current symbol viewed
CURindex = security(curSymbol,res,((close-close[1])/close[1])*100)

//bitmex index
XBTindex = security("BITMEX:XBTUSD",res,((close-close[1])/close[1])*100)
ADAindex = security("BITMEX:BADAXBT",res,((close-close[1])/close[1])*100)
BCHindex = security("BITMEX:BBCHXBT",res,((close-close[1])/close[1])*100)
EOSindex = security("BITMEX:BEOSXBT",res,((close-close[1])/close[1])*100)
ETHindex = security("BITMEX:BETHXBT",res,((close-close[1])/close[1])*100)
LTCindex = security("BITMEX:BLTCXBT",res,((close-close[1])/close[1])*100)
XRPindex = security("BITMEX:BXRPXBT",res,((close-close[1])/close[1])*100)
TRXindex = security("BITMEX:TRXXBT",res,((close-close[1])/close[1])*100)

//SMA 
rsXBT = sma(XBTindex, len1)-sma(CURindex, len1)
rsADA = sma(ADAindex, len1)-sma(CURindex, len1)
rsBCH = sma(BCHindex, len1)-sma(CURindex, len1)
rsEOS = sma(EOSindex, len1)-sma(CURindex, len1)
rsETH = sma(ETHindex, len1)-sma(CURindex, len1)
rsLTC = sma(LTCindex, len1)-sma(CURindex, len1)
rsXRP = sma(XRPindex, len1)-sma(CURindex, len1)
rsTRX = sma(TRXindex, len1)-sma(CURindex, len1)

//plot
plot(rsXBT,title="XBT",color=black, transp=0, linewidth=2)
plot(rsADA,title="ADA",color=gray, transp=0, linewidth=2)
plot(rsBCH,title="BCH",color=yellow, transp=0, linewidth=2)
plot(rsEOS,title="EOS",color=orange, transp=0, linewidth=2)
plot(rsETH,title="ETH",color=blue, transp=0, linewidth=2)
plot(rsLTC,title="LTC",color=teal, transp=0, linewidth=2)
plot(rsXRP,title="XRP",color=fuchsia, transp=0, linewidth=2)
plot(rsTRX,title="TRX",color=purple, transp=0, linewidth=2)