... 有條股價平均線,股價波動喺上限同下限嘅區間之內,條帶狀區嘅寬窄,隨著股價波動幅度嘅大小而變化。

布林綫一般取20日作為參數。

(2)計算公式中軌線=N日的移.Login/SignupDownloadappDownloadapp+CongratulationsYou'vesuccessfullygotadvancedquotesworth5000HKDDownloadAPP>>HomeNewsHelpCenterAboutLanguage简繁ENHelpCenterFundamentalanalysisIndexintroductionBOLLBollingerlineFundamentalanalysisMacroanalysisIndexintroductionCompanyanalysisfinancialanalysisPsychoanalysisBOLLBollingerline-Indexintroduction(1)IntroductionBollingerBandsareenvelopesplottedatastandarddeviationlevelaboveandbelowasimplemovingaverageoftheprice.Becausethedistanceofthebandsisbasedonstandarddeviation,theyadjusttovolatilityswingsintheunderlyingprice.BollingerBandsuse2parameters,PeriodandStandardDeviations, StdDev.Thedefaultvaluesare20forperiod,and2forstandarddeviations,althoughyoumaycustomizethecombinations.Bollingerbandshelpdeterminewhetherpricesarehighorlowonarelativebasis.Theyareusedinpairs,bothupperandlowerbandsandinconjunctionwithamovingaverage.Further,thepairofbandsisnotintendedtobeusedonitsown.Usethepairtoconfirmsignalsgivenwithotherindicators.(2)CalculationformulaMiddletrack=N-daymovingaverageUppertrajectory=middletrajectory+twicethestandarddeviationLowertrajectory=middletrajectory-twicethestandarddeviation(3)ApplicationA.Whenthestockpricecrossestheupperlimitpressureline,itcanberegardedasasellingpointsignalB.Whenthestockpricecrossesthelowerlimitsupportline,itcanberegardedasasignaltobuyC.Whenthestockpricecrossesthemiddlelinefrombottomtotop,thisisanoverweightsignal,anditisconsideredthatitmayturnlongD.Whenthestockpricecrossesthemiddlelinefromtoptobottom,itisasignaltosellandisdeemedtobeshort(4)FeaturesA.WhentheK-lineofthestockpricebreaksthroughtheuppertrackoftheBollingerBandandtheTRIXindicatorhasformedabottom"goldencross",itmeansthatthestockpriceisabouttoenteramidtolong-termupwardchannel.ThisisabuysignalofBOLLindicator,atthistime,investorsshouldbuystocksinatimelymanner.B.AftertheBollingerBandhasmovedinanarrowrangeatthebottomforalongperiodoftime,oncetheK-lineofthe