Need suggestion on a strategy

[cniesa71]

Hello all,
I'm want to develop a simple strategy to help me understand NinjaTrader better. In this strategy I want to do the following check:
1. The trend for a stock goes up for the past 150 days, if not, do nothing;
2. If the curve of Moving Average 20 goes across the curve of Moving Average 50, indicate this event.

My questions are:
1. Is there a practical algorithm to find the going-up trend for a stock? I did something by myself, but I don't feel it is a very good way. In my way, I checked Close[150] and Close[0], if Close[150] < Close[0], then this interval is a candidate for the going-up trend; then I checked for individual days in this interval, if the close price keeps going down for consecutive 15 days, I don't think this 150 days interval has a going-up trend.
Please give me some hint or suggestions. I'm new to the stock business, so please be specific.

2. How can I find the cross point between the MA20 and MA50 curve? Which function should I use for the existing library?

Thank you very much for your time.

[NinjaTrader_JC]

Hello cniesa71,

Welcome to the NinjaTrader Support Forums!

1. Yes, there is a method call "CountIf()" that you may use that will test the number of occurcences over a look back period so that you can tell if a stock has been trending. So for example you can set this up on a daily chart and use CountIf() to see if the Close has been greater than the open for the past 150 days.

Example;

// If in the last 150 bars we have had 150 up bars then go long
if (CountIf(delegate {return Close[0] > Open[0];}, 150) >= 150)
    EnterLong();

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?countif.htm

2. As to find the Cross you may use the CrossAbove() method built into NinjaTrader:

if (CrossAbove(SMA(20), EMA(50), 1))
    //Do Something

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?crossabove.htm

Our Help Guide has many different examples and descriptions that you may want to view to help get use to the software.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?alphabetical_reference.htm

Let us know if we can be of further assistance.