# Pre-Market Gap from Previous Close for ThinkorSwim

#### chrisj1881

##### New member
Hello is there a way to get the scanner to look for a full gap including yesterday's candle wicks instead of using a percentage gap?
Pre-Market Gap from Previous Close for ThinkorSwim
Ruby:
``````# Scan PreMarket: Scan for 1 Percent gap from Previous Close
# Scan at 5 min aggregation or less
# Mobius
# Chat Room Request

def PrevClose = if SecondsTillTime(1555) == 0 and
SecondsFromTime(1555) == 0
then close
else PrevClose[1];
def ScanActive = if SecondsTillTime(0930) >= 0 and
SecondsFromTime(0730) > 0
then 1
else 0;
def ll = if ScanActive and !ScanActive[1]
then low
else if !ScanActive
then double.nan
else if ScanActive and low < ll[1]
then low
else ll[1];
def hh = if ScanActive and !ScanActive[1]
then high
else if !ScanActive
then double.nan
else if ScanActive and high > hh[1]
then high
else hh[1];
# Comment out (#) Plot NOT wanted
plot gapUP = if ScanActive and ll > PrevClose * 1.01
then 1
else 0;
#plot gapDN = if ScanActive and hh < PrevClose * .99
#             then 1
#             else 0;``````

Last edited by a moderator:
Solution
Hello is there a way to get the scanner to look for a full gap including yesterday's candle wicks instead of using a percentage gap?
Pre-Market Gap from Previous Close for ThinkorSwim
The greatest difficulty is that labels, watchlists and scans requires a precise mathematical-based logic.

It is critical that you define your logic map:
condition 1 is what
condition 2 is what
condition 3 is what
By providing the EXACT math and logic that you want for the label/watchlist/scan, it is a simple step to provide the syntax.

From what I have observed, posts without a visual presentation indicating the precise points you are attempting to scan seldom get responses.
Unsure of how to upload screenshots to the forum...
Hello is there a way to get the scanner to look for a full gap including yesterday's candle wicks instead of using a percentage gap?
Pre-Market Gap from Previous Close for ThinkorSwim
The greatest difficulty is that labels, watchlists and scans requires a precise mathematical-based logic.

It is critical that you define your logic map:
condition 1 is what
condition 2 is what
condition 3 is what
By providing the EXACT math and logic that you want for the label/watchlist/scan, it is a simple step to provide the syntax.

From what I have observed, posts without a visual presentation indicating the precise points you are attempting to scan seldom get responses.
Unsure of how to upload screenshots to the forum,
Here are directions.
And here are some Cool Tips For Creating The Perfect Post.

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