CrossAbove & Below

[Blairski]

NinjaSupport,

I am trying to copy a couple of ThinkorSwim indicators I have over to NinjaTrader and I'm getting errors. Can you help me troubleshoot:


Found answer:

ThinkorSwim CrossAbove or CrossBelow is equivalent to "<" and ">" in NinjaTrader.

[bltdavid]

Current NinjaScript I have:
if (CrossAbove(LinReg(12)[0], LinReg(12)[1],1))

This logic is terribly suspect, are you sure you understand the intent of the original code?

As written, this code (and your CrossBelow, as well) should fail to compile, since the first argument must be a Series.

https://ninjatrader.com/support/helpGuides/nt8/en-us/?crossabove.htm

https://ninjatrader.com/support/helpGuides/nt8/en-us/?crossbelow.htm

[bltdavid]

def runup = (LinearRegCurve(length = 9) crosses above LinearRegCurve(length = 9) from 1 bar ago);
def rundown = (LinearRegCurve(length = 7) crosses below LinearRegCurve(length = 7) from 1 bar ago);

I'm sure I don't understand this, but a LinReg(9) will never 'cross above' another LinReg(9) -- because these are the exact same lines.

Same goes for the LinReg(7) -- it will never 'cross below' itself.

Are you absolutely sure the ThinkScript was copied correctly?

I'm not a ThinkScript expert, for ex, I don't know what "1 bar ago" means, or how it would affect the ability of LinReg(9) to cross above itself ...