Average traded price, also referred to as volume-weighted average price, is what buyers have paid for one share on average, over the course of a specific time period. It is most frequently calculated for a single day but is equally useful for weekly, monthly or yearly periods. To calculate this metric, divide the dollar amount of all trades that took place during the period by the number of shares that changed hands. The dollar amount of all trades is often reported by brokerage houses or finance portals such as Yahoo or Google Finance.
Say a stock opened the day at $10, and a total of 1,000 shares changed hands at that price. Later during the day, the price rose to $10.40, and 5,000 shares changed hands, while the last set of trades were at $10.10 for an additional 1,000 shares. Total dollar volume equals $101,000+ $10.4 5,000+ $10.1*1,000 = $72,100. Total Volume is 1,000+5,000+1,000= 7,000 The Average Traded Price equals $72,100 / 7,000 = $10.30. This is the average cost of the shares to buyers who have bought during this trading day.
ATP is important in that it approximates what most buyers paid for the stock. Neither the opening nor the closing price provide this information. The ATP is crucial especially if the stock has a tendency to swing wildly during the day and subsequently settle close to the opening price. When significant news is announced, stock prices tend to react wildly but then somewhat settle with a move in the opposite direction as the market digests the news. Most long-term stock charts will use either just the day's closing price or the opening and closing price, neither of which will provide an idea where the majority of trading took place.
Use in Technical Analysis
ATP is widely used in technical analysis because it influences resistance levels. Investors try to avoid even minor trading losses. So if investors paid around $10.30 a share and the stock is trading at around $10-$10.10, an advance to right around or slightly above $10.30 may bring in a wave of sales. This is because several investors could wish to unload their unprofitable holding and be waiting for the price to climb back to where they bought to avoid selling at a loss. If so, the stock's price may touch $10.30 and come back down as a result of sales pressure.