Enviado: 5/1/2003 13:08Ah, e Fernando, já agora queria chamar-te a atenção para um outro indicador, o price volume trend. É que acabei de descobrir que é simplesmente uma variação deste que andas a "estudar". Quem me chamou a atenção para ele foi o cem (hehehe, umas gotas de graxa a mais não podem fazer mal ao cem, não achas?), num dos antigos posts do emerging-trade. Passopara o PVT para não correr riscos de dizer disparates.
The Price Volume Trend (PVT) is similar in concept to On Balance Volume (see On Balance Volume) in that it is a cumulative total of volume that is adjusted depending on changes in closing prices. But whereas OBV adds all volume on days when prices close higher and subtracts all volume on days when prices close lower, the PVT adds only a portion of the daily volume. The amount of volume added to the PVT is a function of the amount by which prices rose or fell relative to the previous day's close.
PVT = (((C-ref(C,-1)) / ref(C,-1)) * V) + I
Where:
C = Today's closing price
ref(C,-1) = Yesterday's closing price
V = Today's volume
I = Yesterday's Price Volume Trend
The PVT is calculated by multiplying the day's volume by the percentage change of the underlying security and adding this value to a cumulative total. For example, if the security closed up 0.5% and volume was 10,000 shares, we would add 50 (i.e., 0.005 * 10,000 = 50) to the PVT. If the security had closed down 0.5%, we would have subtracted 50 from the PVT.
The interpretation of the Price Volume Trend is similar to the interpretation of On Balance Volume (see On Balance Volume) and the Volume Accumulation/Distribution Line (see Accumulation/Distribution).
Many investors feel that the PVT more accurately illustrates the flow of money into and out of a security than does OBV. This is because OBV adds the same amount of volume to the indicator regardless of whether the security closes up a fraction of a point or doubles in price. However, the PVT adds only a small portion of volume to the indicator when the price changes by a small percentage and adds a large portion of volume to the indicator when prices change by a large percentage.
The Price Volume Trend (PVT) is similar in concept to On Balance Volume (see On Balance Volume) in that it is a cumulative total of volume that is adjusted depending on changes in closing prices. But whereas OBV adds all volume on days when prices close higher and subtracts all volume on days when prices close lower, the PVT adds only a portion of the daily volume. The amount of volume added to the PVT is a function of the amount by which prices rose or fell relative to the previous day's close.
PVT = (((C-ref(C,-1)) / ref(C,-1)) * V) + I
Where:
C = Today's closing price
ref(C,-1) = Yesterday's closing price
V = Today's volume
I = Yesterday's Price Volume Trend
The PVT is calculated by multiplying the day's volume by the percentage change of the underlying security and adding this value to a cumulative total. For example, if the security closed up 0.5% and volume was 10,000 shares, we would add 50 (i.e., 0.005 * 10,000 = 50) to the PVT. If the security had closed down 0.5%, we would have subtracted 50 from the PVT.
The interpretation of the Price Volume Trend is similar to the interpretation of On Balance Volume (see On Balance Volume) and the Volume Accumulation/Distribution Line (see Accumulation/Distribution).
Many investors feel that the PVT more accurately illustrates the flow of money into and out of a security than does OBV. This is because OBV adds the same amount of volume to the indicator regardless of whether the security closes up a fraction of a point or doubles in price. However, the PVT adds only a small portion of volume to the indicator when the price changes by a small percentage and adds a large portion of volume to the indicator when prices change by a large percentage.
em perceber o como se lê....). Ao mesmo tempo vou aproveitar para tentar descobrir e aproveitar o comentário do Cem quanto às médias móveis exponensiais ponderadas com volume e tentar descobrir como é que vou convencer o meta a calcular-me tal indicador ou se já há alguma coisa já pré-fabricada e aproveitavel (tens alguma ideia...?) para brincar neste domingo cheio de neve por aqui.
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