PsychSignal sentiments data taken from www.quandl.com/PSYCH/
study("PsychSignal: Bullish Sentiment Index", shorttitle="BULL", precision=2)
quandl_ticker = "QUANDL:PSYCH/" + ticker + "_I"
data = security(quandl_ticker+"|0", "D", close)
plot(data, color=green, style=histogram)