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# Exchange Comparison [Diabolicus]

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This script helps you compare bitcoin prices across different currency pairs and exchanges. Quickly judge at a glance if "your" exhange currently trades above or below the rest of the market.
Each colored line represents an exchange pair of your choice. Exchange pairs must be entered normalized to USD, so for BTCEUR             or XBTEUR multiply by EURUSD             , for BTCCNY             divide by USDCNH             respectively.
```study("Exchange Comparison [Diabolicus]", shorttitle="ExComp_Dia", overlay=true)

// 141113
// Exchange pairs must be normalized to USD, so multiply by EURUSD or divide by USDCNH respectively

pair1 = input(defval="BITFINEX:BTCUSD",title="Exchange Pair 1 Yellow")
pair2 = input(defval="BTCE:BTCUSD",title="Exchange Pair 2 Green")
pair3 = input(defval="BITSTAMP:BTCUSD",title="Exchange Pair 3 Orange")
pair4 = input(defval="KRAKEN:XBTEUR*EURUSD",title="Exchange Pair 4 Blue")
pair5 = input(defval="HUOBI:BTCCNY/USDCNH",title="Exchange Pair 5 Red")
pair6 = input(defval="OKCOIN:BTCCNY/USDCNH",title="Exchange Pair 6 Lime")

sym_hl2(s)=>security(s,period,hl2)
eurusd = sym_hl2("FX:EURUSD")
usdcnh = sym_hl2("FX:USDCNH")

base = ticker == "XBTEUR" ? 2 : ticker == "BTCEUR" ? 2 : ticker == "BTCCNY" ? 3 : 1

factor = base==2 ? 1/eurusd : base==3 ? usdcnh : 1

p1=plot(sym_hl2(pair1)*factor,color=yellow,linewidth=2)
p2=plot(sym_hl2(pair2)*factor,color=green,linewidth=2)
p3=plot(sym_hl2(pair3)*factor,color=orange,linewidth=2)
p4=plot(sym_hl2(pair4)*factor,color=blue,linewidth=2)
p5=plot(sym_hl2(pair5)*factor,color=red,linewidth=2)
p6=plot(sym_hl2(pair6)*factor,color=lime,linewidth=2)
```
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