diff --git a/robot.py b/robot.py
index 5ef9e0d..afb02cc 100644
--- a/robot.py
+++ b/robot.py
@@ -137,7 +137,7 @@ figNum = 1
 if len(show_symbols) > 0:
 	for symbol in show_symbols:
 		if symbol in symbols:
-			title = Stock(symbol, symbols[symbol])
+			title = Stock(params, symbol, symbols[symbol])
 			title.fetch()
 			title.statistics()
 			ind = title.analyze(buy_callback, range_days=params['show_range_days'])
diff --git a/stock.py b/stock.py
index f03dc3c..3d30cd8 100644
--- a/stock.py
+++ b/stock.py
@@ -100,10 +100,11 @@ class Stock(object):
 		spl = UnivariateSpline(x=x_r, y=y_r, k=5)
 		spl.set_smoothing_factor(0.25)
 		spl_d = spl.derivative()
-		spl_dd = spl_d.derivative()
+		spl_dd = spl.derivative().derivative()
 		yf = spl(x_r)
 		yf_d = spl_d(x_r)
-		yf_dd = spl_dd(x_r)
+		x_r2 = np.linspace(-1, N-1, N)
+		yf_dd = spl_dd(x_r2)
 
 		self.data['macd_f'] = np.transpose(yf)
 		self.data['macd_fd'] = np.transpose(yf_d)