Advance-Decline Line (A-D Line) ... used to spot divergences relative to a general market price index, such as the S&P 500 or Dow Jones Industrial Average.CMT®ProgramAbouttheProgramCMTLevelICMTLevelIICMTLevelIIIRemoteProctoringPoliciesandProceduresCMTLevelIWaiverRegulatoryRecognitionAcademicPartnerProgramParticipatingPrepProvidersTestimonialsMembershipBecomeaMemberMemberBenefitsDigitalBadgingDiscounts&ResourcesVolunteerOpportunitiesChaptersCMTIndiaLearning&EventsCalendar2021EuropeanSummit2020IndiaSummitWebinarsPodcastsVideoArchivesResearch&AnalysisTechnicallySpeakingTechnicalInsightsMembersintheMediaJournalofTechnicalAnalysisAwardsAboutGovernanceCodeOfEthicsAcademicPartnerProgramPressRoomTAEFCommitteesAwardsVolunteerOpportunitiesPrivacyPolicyMyCMTMyAccountHistoricalTransactionsMemberDirectoryLoginJoinNowpublicAdvance-DeclineLineAdvance-DeclineLine(A-DLine)TheCumulativeDailyAdvance-DeclineLine,perhapsthemostwidelyknownmarketbreadthindicator,traditionallyhasbeenusedtospotdivergencesrelativetoageneralmarketpriceindex,suchastheS&P500orDowJonesIndustrialAverage.Mostcommonly,theCumulativeA-DLineiscalculatedasarunningtotalofdailynetadvancingminusdecliningstockissuesontheNewYorkStockExchange.Similarindicatorsmaybecalculatedforothermarkets,suchasNASDAQ,andweeklydataalsomaybeused.Thereareonlytwostepstocomputethisindicator.1.Fromthenumberofadvancingissues,subtracttonumberofdecliningissueseachday,respectingsign.Thisisnetadvancingissues,anditisoftenanegativenumber.2.Addthatdailyadvance-declinesdifferencetoacumulativetotalofthedailynetadvancingissues.ThisformsacontinuouslinethatrisesandfallswithbreadthtrendsontheNYSE.A-DLineValuedayT=(#ofAdvancingStocksdayT–#ofDecliningStocksdayT)+A-DLineValuedayT-1Source:Colby,Robert.TheEncyclopediaofTechnicalMarketIndicators;(c)2003. ThefollowingchartisanexampleofanAdvanceDeclineLine.         Source:ChartscreatedbyBloombergLP. Allrightsreserved.ClickhereformoreinformationonBloomberg.ThefollowingchartisanexampleofanAdvanceDeclineLinewithshading.