CODEWITHSUNDEEP
pine-script
Drewdavid
Drewdavid

Reputation: 3192

How to check range of previous bars for condition

I have 3 moving averages (we'll call them slow, medium and fast). When the medium crosses below the slow, I am looking for shorts. However, I want to wait until the fast one "peaks" (that is, is heading up, and then starts to move down) before generating a signal.

I have an arbitrary length of time I'm willing to wait for this fast MA move downward... eg within 10 bars.

How can I say "If fast MA turns downward within 10 bars after the medium MA crosses below the slow MA, plotshape"?

Eg here is where I would want my signal (happens to be 6 bars after the cross in this case):

enter image description here

Here is my current code:

medSlowCrossdown = crossunder(vmaVolMed,vmaVolSlow)
fastTurndown = rising(vmaVolFast[1],2) and falling(vmaVolFast,1)
nextFastTurndown = medSlowCrossdown[1-10] and fastTurndown

plotshape(nextFastTurndown, style=shape.circle, location=location.top)

Note: you will see I tried adding a range within the bar index medSlowCrossdown[1-10], as that seemed logical, but it produced an error of:

line 62: ./TVScriptAnalyzer.g: node from line undefined:-1 no viable alternative at input 'UP'

Upvotes: 0

Views: 2406

Answers (1)

Urso haha
Urso haha

Reputation: 184

Here's a script that looks back 10 bars for medium to cross slow and fast peaking previous bar.

//@version=4
study("My Script")

_fast = ema(close, 6)
_medium = ema(close, 20)
_slow = ema(close, 50)

_medSlow = barssince(crossunder(_medium, _slow)) // bars since medium crossed slow
_fastPeaked = _fast<_fast[1] and _fast[1]>_fast[2] // true if fast peaked previous bar
_shortCondition = _medSlow < 10 and _fastPeaked // true if medium crossed slow less than 10 bars ago and fast just peaked

plotshape(_shortCondition?close:na, style=shape.triangledown, size=size.normal, color=color.red)

plot(_fast, color=color.orange)
plot(_medium, color=color.green)
plot(_slow, color=color.red)

enter image description here

Upvotes: 2

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