Buy when SMA1[0] Crossbelow SMA1[1]

[funtra513]

Hello,

I currently messing around with NinjaScript to get used to it and there a simple question popped up:
I would like to program a very simple strategy.
I have a SMA with the length of 10 and I would like to buy when the value of the SMA on the current bar falls below the value of the SMA of the previous bar. I have tried to code this with CrossBelow(), which of course did not work since CrossBelow needs a series as an argument. My next try was slope, but I got kind of stuck there. Can somebody please provide a simple code snippet here?

Thank you very much in advance!

[NinjaTrader_ChelseaB]

Hello funtra513,

The SMA does return a plot series which can be used for a CrossBelow/Above.

However, it does not appear you want a cross, you want to know when the SMA(10) on the current bar is less than the SMA(10) of 1 bar ago.

if (SMA(10)[0] < SMA(10)[1])

Below I am providing a link to a forum post with helpful information about getting started with NinjaScript and C#. Please watch the video 'Automate Your Trading with NinjaTrader's Strategy Builder'.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/97575-sample-scripts?p=786040#post786040

[funtra513]

Thanks for the fast reply.

Sorry I forogt to mention, that I am specifically looking for a crossover or the point when the slope of the SMA is changing from rising to falling or the other way around.

[NinjaTrader_ChelseaB]

Hello funtra513,

There is a Slope method available to give the slope between two points.

https://ninjatrader.com/support/helpGuides/nt8/slope.htm

There are also IsRising and IsFalling methods to know if a series is rising or falling.

https://ninjatrader.com/support/helpGuides/nt8/rising.htm

https://ninjatrader.com/support/helpGuides/nt8/falling.htm

You can save these values to a variable, if you want to compare with the previous bar.

[funtra513]

Hello,

IsRising and IsFalling is not really useful in this case, because I want the trade to open only when the slope turns and not as long as the slope is negative.
One of my ideas would be to create a data series of the slope and then combine it with the CrossBelow and Above function, but to me this seems a little too much effort for such a simple trading idea. Is their no other way of indicating the point when the slope turns?

[NinjaTrader_ChelseaB]

Hello funtra513,

The Slope has a start bar and end bar parameter. Meaning you can compare the slope between any two bars with any other two bars.

For example you could compare the slope from 1 bar ago to 0 bars ago with 2 bars ago to 1 bar ago.