The inverted chart of the current financial instrument, displaying Ask and Bid price levels in the form of colored bars in the additional window.

//+----------------------------------------------+  //|  INDICATOR INPUT PARAMETERS                  |  //+----------------------------------------------+  input bool AskShow=true;                       // display Ask  input color AskColor=clrBlue;                  // Ask line color  input ENUM_LINE_STYLE AskStyle=STYLE_SOLID;    // Ask line style  input bool BidShow=true;                       // display Bid  input color BidColor=clrRed;                   // Bid line color  input ENUM_LINE_STYLE BidStyle=STYLE_SOLID;    // Bid line style  input int IndicatorDigits=6;                   // indicator display accuracy format  

Fig. 1. Bar_Plus indicator