Piriod=input('720')
ch1 = security(tickerid, Piriod, open)
ch2 = security(tickerid, Piriod, close)
longCondition = crossover(security(tickerid, Piriod, close),security(tickerid, Piriod, open))
if (longCondition)
strategy.entry("BUY", strategy.long)
shortCondition = crossunder(security(tickerid, Piriod, close),security(tickerid, Piriod, open))
if (shortCondition)
strategy.entry("SELL", strategy.short)
mancava un pezzo alla fine...