extern period1 = 12;extern period2 = 26;extern period3 = 9;extern period_ma = 10;function calc() { line[0] = IndRef("macd", period1, period2, period3, ind_ema, ind_ema, ind_ema, pt_close)[0]; line[1] = IndRef("macd", period1, period2, period3, ind_ema, ind_ema, ind_ema, pt_close)[1]; line[2] = MovAvg(ind_ema, period_ma, line[0]);}