# How to compare the 4-hour aggregation open price with the previous day's high and low

#### shakib3585

##### Active member
VIP
Hi All,

I intend to scan if a previous 4 hour open price is greater than a pivot based on previous day's high/low. I plan to scan in a 4-hour aggregation period. The code that I made is as follows,

" def HD = high(period = aggregationperiod.Day)[1];
def LD = low ( period = aggregationperiod.day)[1];
def P1 = 0.5*(HD + LD );

plot scan = open[1]> P1; "

I know tos has a secondary aggregation problem, which tends to create uncertainty about whether my code will be properly executed or not. I am seeking advice on how I can make my criteria run accurately and without issue.

Thank you

Solution
Hi All,

I intend to scan if a previous 4 hour open price is greater than a pivot based on previous day's high/low. I plan to scan in a 4-hour aggregation period. The code that I made is as follows,

" def HD = high(period = aggregationperiod.Day)[1];
def LD = low ( period = aggregationperiod.day)[1];
def P1 = 0.5*(HD + LD );

plot scan = open[1]> P1; "

I know tos has a secondary aggregation problem, which tends to create uncertainty about whether my code will be properly executed or not. I am seeking advice on how I can make my criteria run accurately and without issue.

Thank you
It is not a matter of whether your code will be properly executed
The ToS platform does not provide for ANY scans of secondary aggregations.
It...
Hi All,

I intend to scan if a previous 4 hour open price is greater than a pivot based on previous day's high/low. I plan to scan in a 4-hour aggregation period. The code that I made is as follows,

" def HD = high(period = aggregationperiod.Day)[1];
def LD = low ( period = aggregationperiod.day)[1];
def P1 = 0.5*(HD + LD );

plot scan = open[1]> P1; "

I know tos has a secondary aggregation problem, which tends to create uncertainty about whether my code will be properly executed or not. I am seeking advice on how I can make my criteria run accurately and without issue.

Thank you
It is not a matter of whether your code will be properly executed
The ToS platform does not provide for ANY scans of secondary aggregations.
It simply won't run.

The ToS platform does not allow multiple timeframes to be used in the scan hacker, watchlists, conditional orders, etc...
This code is only for plotting on a chart.

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