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NinjaScript Assistance: When a slope goes flat
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NinjaScript Assistance: When a slope goes flat

  #1 (permalink)
Elite Member
LONDON + ENGLAND
 
Futures Experience: Beginner
Platform: TT, CQG, WL, NT8, CSI
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Posts: 9 since Dec 2016
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NinjaScript Assistance: When a slope goes flat

Hi all,

I am reasonably new to C# but making progress with learning it on NT8.
I am having a issue with defining a condition and hoping someone could point me in the right direction.

Lets say I have a oscillator (RSI for instance) that can move between 100 and -100.


- I'd like to colour it green when it moves beyond 70..... and stay green while it stays above 0.
- Once below zero, it becomes grey.
- I'd like to colour it red when it moves below -70.... and stay red while it stays below 0.

In the OnBarUpdate() method...

- If I say: If(RSI[0] > 70) >>> thats only makes values ABOVE 70 green, and when we have a value of 65, that condition is not longer true (so doesnt satisfy the "stay green while it stays above 0" bit).

- If I say: If(CrossAbove(RSI)...) >>> that only colours that 1 value, and the condition is no longer true on the next bar, so that doesn't work either.

- If I says: If(CrossAbove(RSI)...) >>>
While(RSI>0) >>> that doesn't work either because the CrossAbove condition only satisfies the cross over bar.

Any insight into how one would translate this into a C# structure would be great.
I've attached a screenshot to better illustrate my goal.

Attached Thumbnails
NinjaScript Assistance: When a slope goes flat-test1.png  
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  #2 (permalink)
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  #3 (permalink)
Seth
Salt Lake City, Utah
 
Futures Experience: Beginner
Platform: Jigsaw, NinjaTrader8
Favorite Futures: ZB
 
Posts: 336 since Apr 2016
Thanks: 13 given, 270 received


What you need is a boolean to track which state you are in. If you last crossed the top/bottom line or not. Something maybe like this:


 
Code
If(!hasCrossedTopLine && RSI[0] > 70)
{
    hasCrossedTopLine = true;
    //change line color
}

if(hasCrossedTopLine && RSI[0] > 0)
{
    hasCrossedTopLine = false;
    //change line color
}

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  #4 (permalink)
Elite Member
LONDON + ENGLAND
 
Futures Experience: Beginner
Platform: TT, CQG, WL, NT8, CSI
Favorite Futures: Futures
 
Posts: 9 since Dec 2016
Thanks: 9 given, 6 received

Thanks TWDsje,

Am I correct in saying that hasCrossedTopLine is the boolean variable right ?
So I'll need to declare this variable along with the other variables

 
Code
bool hasCrossedTopLine = true;

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  #5 (permalink)
Seth
Salt Lake City, Utah
 
Futures Experience: Beginner
Platform: Jigsaw, NinjaTrader8
Favorite Futures: ZB
 
Posts: 336 since Apr 2016
Thanks: 13 given, 270 received


ajk1 View Post
Thanks TWDsje,

Am I correct in saying that hasCrossedTopLine is the boolean variable right ?
So I'll need to declare this variable along with the other variables

 
Code
bool hasCrossedTopLine = true;

Yeah exactly. At some point you may find yourself in a situation where you have multiple booleans, and it can be hard to sort out what your if statement and so forth should be. If you ever run into this look up "truth tables".

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