# Library OHLC By [cryptolinx](https://paragraph.com/@cryptolinx) ยท 2023-03-31 --- ![](https://storage.googleapis.com/papyrus_images/cfdcfd14f78b8daff972da53f5503a95296873ec255a49d87fd792cf1bb4ce9d.png) **๐Ÿ“• LIBRARY OHLC** **๐Ÿ”ท Introduction** This library is a custom library designed to work with real-time bars. It allows to easily calculate OHLC values for any source.Personally, I use this library to accurately display the highest and lowest values on visual indicators such as my progress bars. * * * * * * ๐Ÿ”ท **How to Use** โ—ผ 1. Import the OHLC library into your TradingView script: \- or - Instead of the library namespace, you can define a custom namespace as alias. import cryptolinx/OHLC/1 as src * * * โ—ผ 2. Create a new OHLC source using the \`new()\` function. varip mySrc = OHLC.new() // It is required to use the `varip` keyword to init your `` \- or - If you has set up an alias before. \=== In that case, your \`\` needs to be \`na\`, define your object like that varip mySrc = na * * * โ—ผ 3. Call the \`hydrateOHLC()\` method on your OHLC source to update its values: Basic float rsi = ta.rsi(close, 14) mySrc.hydrateOHLC(rsi) \- or - Inline rsi = ta.rsi(close, 14).hydrateOHLC(mySrc) * * * โ—ผ 4. The data is accessible under their corresponding names. mySrc.open mySrc.high mySrc.low mySrc.close ๐Ÿ”ท **Note:** This library _only_ works with _real-time bars_ and will not work with historical bars. * * * // This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/ // ยฉ cryptolinx - jango_blockchained - open ๐Ÿ’™ source //@version=5 // โ–ช โ”€โ”€โ”€โ”€ LIBRARY // โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘ // @description // This library provides a simple way to calculate OHLC values for any source. // ___ // **Limitations:** This library only works with real-time bars. It will not work // with historical bars, // ___ library('OHLC', overlay = false) // >> // -- OHLC Source { // // @type A source that can be used to calculate OHLC values. // @field close The last close value. // @field open The last open value. // @field high The last high value. // @field low The last low value. // @field length The number of bars since the last open. export type src // -- float close float open float high float low int length = 0 // } // -- Build-In Overloaded/Expanded Functions { // method nz(float _src, float _target) => na(_src) ? _target : _src method nz(src _src, src _target) => na(_src) ? _target : _src // } // -- OHLC Source Methods { // // @function Hydrates the OHLC source with a new value. // ___ // @param this The source to hydrate. // @param _src The new value. // @returns float The hydrated source. export method hydrateOHLC(src this, float _src) => if not na(_src) this.close := _src if barstate.isnew this.open := this.close this.low := this.close this.high := this.close this.length := 0 this.low := math.min(this.low.nz(this.close), this.close) this.high := math.max(this.high.nz(this.close), this.close) this.length += 1 // >> this // -- // // @note The "method overloading" and "argument flipping" pattern used in this // code can also be manually applied to any custom function inside your script. // This can be useful for creating more flexible and versatile functions that // can be used in different contexts and with different argument orders. export method hydrateOHLC(float _src, src this) => this.hydrateOHLC(_src), _src // } // -- New OHLC Source { // // @function Creates a new OHLC source. // ___ // [![required varip](https://img.shields.io/badge/required-varip-blue?logo=tradingview&style=flat-square)](https://www.tradingview.com/pine-script-docs/en/v5/language/Variable_declarations.html?highlight=varip#varip) // ___ // **NOTE:** // Needs to be initialized by using the `varip` keyword. // @returns src A new blank OHLC source object. export new() => src.new() // } // โ–ช โ”€โ”€โ”€โ”€ EXAMPLES // โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘โ–‘ // -- Example #1 { // // @variable rsi Example RSI calculation // @variable mySrc Example OHLC source. rsi = ta.rsi(close, 14) varip mySrc2 = src.new() mySrc2.hydrateOHLC(rsi) // equals to rsi.hydrateOHLC(mySrc) // } // -- Example #2 { // // @variable mySrc2 Example OHLC source // @variable rsi2 Example RSI calculation varip mySrc = src.new() rsi2 = ta.rsi(close, 5).hydrateOHLC(mySrc) // equals to mySrc2.hydrateOHLC(rsi) // } // -- Plotting { // // @variable __PLOT_CANDLE var __PLOT_CANDLE = input.bool(true, title='Plot Candle') // -- // @variable rsiPlot rsiPlot = plot(not __PLOT_CANDLE or not barstate.islast ? mySrc.close : na, color = mySrc.close > mySrc.open ? color.green : color.red) // -- fill( plot1 = plot(not __PLOT_CANDLE and barstate.islast ? mySrc.high : na, color = color.new(color.white, 85)), plot2 = rsiPlot, bottom_value = 0, top_value = 100, bottom_color = #00000000, top_color = color.new(color.red, 90)) // -- fill( plot1 = rsiPlot, plot2 = plot(not __PLOT_CANDLE and barstate.islast ? mySrc.low : na, color = color.new(color.white, 85)), bottom_value = 0, top_value = 100, bottom_color = color.new(color.green, 90), top_color = #00000000) // -- plotcandle( open = __PLOT_CANDLE and barstate.islast ? mySrc.open : na, high = __PLOT_CANDLE and barstate.islast ? mySrc.high : na, low = __PLOT_CANDLE and barstate.islast ? mySrc.low : na, close = __PLOT_CANDLE and barstate.islast ? mySrc.close : na, title = 'RSI Candle', color = mySrc.open > mySrc.close ? color.red : color.green, wickcolor = mySrc.open > mySrc.close ? color.red : color.green, bordercolor = mySrc.open > mySrc.close ? color.red : color.green) // } // #EOF [Subscribe](null) cryptolinx - jango\_blockchained โœจ --- *Originally published on [cryptolinx](https://paragraph.com/@cryptolinx/library-ohlc)*