所謂趨勢線就是上(shang)(shang)漲(zhang)行(xing)(xing)(xing)情中(zhong)兩個以(yi)上(shang)(shang)的(de)低點的(de)連線以(yi)及下(xia)跌(die)行(xing)(xing)(xing)情中(zhong)兩個以(yi)上(shang)(shang)高點的(de)連線，前(qian)者(zhe)被(bei)稱上(shang)(shang)升趨勢線，后(hou)者(zhe)被(bei)稱為下(xia)降趨勢線。上(shang)(shang)升趨勢線的(de)功(gong)(gong)能(neng)(neng)(neng)在(zai)(zai)于能(neng)(neng)(neng)夠顯(xian)示(shi)出(chu)價(jia)(jia)格(ge)上(shang)(shang)升的(de)支撐位，一旦價(jia)(jia)格(ge)在(zai)(zai)波(bo)動過程(cheng)中(zhong)跌(die)破(po)此線，就意味著行(xing)(xing)(xing)情可(ke)能(neng)(neng)(neng)出(chu)現反轉，由漲(zhang)轉跌(die)；下(xia)降趨勢線的(de)功(gong)(gong)能(neng)(neng)(neng)在(zai)(zai)于能(neng)(neng)(neng)夠顯(xian)示(shi)出(chu)價(jia)(jia)格(ge)下(xia)跌(die)過程(cheng)中(zhong)回升的(de)阻力，一旦價(jia)(jia)格(ge)在(zai)(zai)波(bo)動中(zhong)向上(shang)(shang)突(tu)破(po)此線，就意味著價(jia)(jia)格(ge)可(ke)能(neng)(neng)(neng)會止跌(die)回漲(zhang)。
二、投資(zi)者在畫(hua)趨勢(shi)線時應注意以(yi)下幾點：
1.趨(qu)勢(shi)線(xian)(xian)根據價格波動時間(jian)的(de)長短(duan)分為(wei)長期(qi)趨(qu)勢(shi)線(xian)(xian)、中期(qi)趨(qu)勢(shi)線(xian)(xian)和短(duan)期(qi)趨(qu)勢(shi)線(xian)(xian)，時間(jian)周期(qi)越長，趨(qu)勢(shi)線(xian)(xian)的(de)有(you)效(xiao)性就越高。
2.趨勢線連接的高點(dian)或低點(dian)的數量越多，有(you)效性就越強
3.對趨勢(shi)線的短(duan)暫突破
4.趨勢(shi)線不應過(guo)于陡峭，否則(ze)很(hen)容易被(bei)橫向(xiang)整理(li)突破(po)，失(shi)去分析意義
三(san)、趨勢線使用(yong)技巧和方法:
1.從切線(xian)理(li)論角度看，趨(qu)勢(shi)(shi)(shi)(shi)(shi)線(xian)是(shi)(shi)(shi)其(qi)中的(de)(de)一(yi)(yi)(yi)部分，它是(shi)(shi)(shi)將波動運行的(de)(de)價格的(de)(de)低點(dian)(dian)(dian)和(he)低點(dian)(dian)(dian)連接或高(gao)(gao)點(dian)(dian)(dian)和(he)高(gao)(gao)點(dian)(dian)(dian)連接而(er)形成的(de)(de)直線(xian)。如果價格是(shi)(shi)(shi)按(an)一(yi)(yi)(yi)個(ge)(ge)低點(dian)(dian)(dian)比一(yi)(yi)(yi)個(ge)(ge)低點(dian)(dian)(dian)高(gao)(gao)的(de)(de)運行方式來(lai)(lai)運行，所(suo)畫出來(lai)(lai)的(de)(de)趨(qu)勢(shi)(shi)(shi)(shi)(shi)線(xian)就(jiu)是(shi)(shi)(shi)上(shang)升(sheng)趨(qu)勢(shi)(shi)(shi)(shi)(shi)線(xian)；如果價格是(shi)(shi)(shi)按(an)一(yi)(yi)(yi)個(ge)(ge)高(gao)(gao)點(dian)(dian)(dian)比一(yi)(yi)(yi)個(ge)(ge)高(gao)(gao)點(dian)(dian)(dian)低的(de)(de)運行方式來(lai)(lai)運行，所(suo)畫出來(lai)(lai)的(de)(de)趨(qu)勢(shi)(shi)(shi)(shi)(shi)線(xian)就(jiu)是(shi)(shi)(shi)下降趨(qu)勢(shi)(shi)(shi)(shi)(shi)線(xian)。還有(you)一(yi)(yi)(yi)種(zhong)是(shi)(shi)(shi)價格的(de)(de)低點(dian)(dian)(dian)和(he)高(gao)(gao)點(dian)(dian)(dian)橫(heng)向延伸(shen)，沒有(you)明顯的(de)(de)上(shang)升(sheng)和(he)下降趨(qu)勢(shi)(shi)(shi)(shi)(shi)，這就(jiu)是(shi)(shi)(shi)橫(heng)盤整理(li)或稱為箱形整理(li)。
2.趨(qu)勢(shi)線(xian)(xian)(xian)可以分(fen)成(cheng)(cheng)支(zhi)撐線(xian)(xian)(xian)和壓力線(xian)(xian)(xian)，將價格波段(duan)運(yun)行的(de)低點(dian)(dian)和低點(dian)(dian)連接成(cheng)(cheng)一條直線(xian)(xian)(xian)，就是支(zhi)撐線(xian)(xian)(xian)；將價格波段(duan)運(yun)行的(de)高點(dian)(dian)和高點(dian)(dian)連接成(cheng)(cheng)一條直線(xian)(xian)(xian)，就是壓力線(xian)(xian)(xian)。趨(qu)勢(shi)線(xian)(xian)(xian)的(de)長短(duan)與其重要性成(cheng)(cheng)正比(bi)，長期(qi)(qi)趨(qu)勢(shi)線(xian)(xian)(xian)和中(zhong)期(qi)(qi)趨(qu)勢(shi)線(xian)(xian)(xian)第一點(dian)(dian)和第二(er)點(dian)(dian)的(de)距離(li)不(bu)應太近(jin)，如距離(li)過近(jin)，所形成(cheng)(cheng)的(de)趨(qu)勢(shi)線(xian)(xian)(xian)的(de)重要性將降低。
3.趨勢(shi)線(xian)的角度(du)(du)至關重要，過(guo)于平緩的角度(du)(du)顯示出力(li)度(du)(du)不(bu)夠(gou)，不(bu)容易(yi)馬上產生大行情；過(guo)于陡峭的趨勢(shi)線(xian)則不(bu)能(neng)持久，往往容易(yi)很快轉變趨勢(shi)。
4.著名角度(du)線(xian)大師(shi)江恩認為：４５度(du)角的(de)(de)趨勢線(xian)非(fei)常可靠，也就是江恩所(suo)說的(de)(de)１×１角度(du)線(xian)。
5.確立趨勢線對于(yu)操作具有非常重要的(de)意義。"順勢而為(wei)"就是其中的(de)精華。
6.支撐線(xian)(xian)(xian)和(he)壓(ya)(ya)(ya)力(li)(li)線(xian)(xian)(xian)是(shi)可以相互轉(zhuan)化的(de)，當價(jia)(jia)格從(cong)上(shang)向(xiang)下突(tu)破一條(tiao)支撐線(xian)(xian)(xian)后(hou)，原有(you)的(de)支撐線(xian)(xian)(xian)將(jiang)可能轉(zhuan)變為壓(ya)(ya)(ya)力(li)(li)線(xian)(xian)(xian)；而當價(jia)(jia)格從(cong)下向(xiang)上(shang)突(tu)破一條(tiao)壓(ya)(ya)(ya)力(li)(li)線(xian)(xian)(xian)后(hou)，原有(you)的(de)壓(ya)(ya)(ya)力(li)(li)線(xian)(xian)(xian)也將(jiang)可能轉(zhuan)變為支撐線(xian)(xian)(xian)。在(zai)某些時候，我們(men)可以發現，價(jia)(jia)格運(yun)行在(zai)兩(liang)條(tiao)相互平行的(de)趨勢線(xian)(xian)(xian)之間(jian)，上(shang)面的(de)線(xian)(xian)(xian)為壓(ya)(ya)(ya)力(li)(li)線(xian)(xian)(xian)，下面的(de)線(xian)(xian)(xian)為支撐線(xian)(xian)(xian)。兩(liang)條(tiao)趨勢線(xian)(xian)(xian)就構成了通道(dao)或形態。
