Error Log setting up parameters

[stefy]

I created a simple strategy with the wizard, using a custom made indicator (difference between two values * 100).
I set up upper and lower boundaries "high" and "low" as double values in the wizard.
I get the following error message:
Error on getting/setting property 'Low' for strategy 'MeanReversionSMAEMA': An object like 'NinjaTrader.Indicator.DataSeriesHelper' cannot be converted into 'System.Double'.
Error on getting/setting property 'High' for strategy 'MeanReversionSMAEMA': An object like 'NinjaTrader.Indicator.DataSeriesHelper' cannot be converted into 'System.Double'.

Thanks

[NinjaTrader_JoshP]

High and Low are reserved words. Please choose different names for your variables.