Thinking in Pine - Study References Too Many Bars In the HistoryWelcome to "Thinking in Pine" short video series on the topics of Pine Script.
Today's topic is handling the error - "The study references too many candles in the history" and other bar_index related issues.
If you are not familiar with Pine Script time series concepts, please go through our previous videos.
Thinking in Pine - Time Series
Thinking in Pine - Special Cases of Time Series
🎲 Points Discussed
When do we get the error "Study references too many candles in the history" and how to overcome this issue.
bar_index limitations with drawing objects on the chart.
🎯 Example Program - Historical Reference Alternative Implementation
// When we are trying to refer to history more than or equal to 10000 bars older
// float value = close
// plot(value)
// Alternative implementation
var values = array.new()
values.unshift(close)
// Throws error on first bar since the number of items is less than 10000
// float valueFromArray = values.get(10000)
// plot(valueFromArray)
//Option 1 - Get the last available value when the number of bars available is less than 10000
float valueFromArray1 = values.get(math.min(bar_index, 10000))
plot(valueFromArray1)
// Option 2 - If number of available bars less than 10000, then set value to na else get the value of 10000 bars back
float valueFromArray2 = values.size() <= 10000? na : values.get(10000)
plot(valueFromArray2)
🎯 Example Program - Drawing Object Limitations with Bar Index
// Trying to create a line too far in history or in future
// if(barstate.islast)
// Throws error as can only draw upto 9999 bars before
// ln1 = line.new(bar_index, high, bar_index-10000, high)
// Throws error as we can only draw upto 500 bars in the future.
// ln2 = line.new(bar_index, high, bar_index+501, high)
startingPoint = ta.valuewhen(bar_index == last_bar_index-10000, time, 0)
float price = 0.0
if(barstate.islast)
// However, we can draw more than 10000 bars back or more than 500 bars in the future using time instead of bar _index
ln = line.new(time, high, startingPoint, high, xloc=xloc.bar_time)
// Cannot use line.get_price when the line is drawn using xloc = xloc.bar_time
// price := ln.get_price(last_bar_index-5000)
