The relative strength index (RSI) is an indicator used in technical analysis to measure the momentum of recent price changes.
How to use volume indicators in trading?
2021-07-28 • Updated
If you trade stocks, you have the information about the volumes of trading provided by a stock exchange. This info allows you to see whether market players back up a price’s trend or not. On the currency market, the situation is different but traders can still get insights from volumes.
Forex market is decentralized so it’s not possible to count all the contracts and their sizes like it’s done at stock markets. As a result, Forex traders use indicators of tick volume.
A tick is any single change or movement in the quote up or down. MetaTrader measures the number of ticks during a single period of time. Thus it’s possible to see how actively the market traded in particular moments. In other words, we don’t know whether there were 500 or 500,000 orders within a certain period, but we know how many ticks the price moved. This is what a tick volume is. It’s important to understand its nature.
How to implement tick volume
MetaTrader offers several indicators of tick volume. To apply them, click “Insert”, then “Indicators” and choose “Volumes”. There are 4 indicators:
The indicator shows the number of price changes (ticks) within each period of a selected timeframe. Volume bars are painted green if they are bigger than the previous ones and red if volume declines.
2. On Balance Volume (OBV)
The indicator is represented in form of a line. If the close price of the current candlestick is higher than that of the previous one, the current volume is added to the previous OBV and the line goes up. If the current candlestick close price is lower than of the previous one, the current volume is subtracted from the previous OBV making the indicator go down. It’s assumed that OBV changes precede price changes, so it can provide signals.
3. Money Flow Index (MFI)
The indicator shows the rate at which money is piled into an asset and then withdrawn from it. Regard it as a version of RSI that takes into account volumes.
This is another indicator calculated on the basis of both price and volume. The higher the volume, the greater the contribution of the price change (for this period of time) will make to the value of the indicator.
Using volumes for technical analysis
Volume indicators can perform very useful tasks:
1. Measure the strength of a trend
A trend is strong when it’s confirmed by rising volume because it means that the market’s interest in this trend is high. So, in an uptrend, volume should increase when the price is moving up and decrease when the price is moving down, while in a downtrend this means increased volume when the price is moving down and decreased volume when the price is moving up.
At the picture above you can see that volume declines during corrections in an uptrend. In the final part of the chart, the new high is not confirmed by volume. It means a likely reversal down.
2. Spot reversals early
It’s always difficult to distinguish between a reversal and a correction at an early stage. Volume indicators help to do it sooner and join the new trend as early as possible.
The price formed a “Head and Shoulders” pattern. Volume was low during the top and even lower at the second shoulder: a confirmation that the market had no more strength to go up.
If there’s a divergence between the price and the volume indicator, it’s a signal of a potential reversal of the existing trend.
3. Confirm a breakout
Volumes are usually low during a consolidation period. If a breakthrough of a range is accompanied by a spike in volume, there’s a higher chance that this is a real and not a false breakout.
Volume rose at the moment when the price went above a resistance level. This helped the price continue moving in the direction of a breakthrough.
4. Identify strong areas of support/resistance
The areas where the price is trading with high volumes may represent significant obstacles on the way of the price and, consequently, good entry and exit level for traders.
Volume indicators in MetaTrader are not independent signals providers but they can be used for confirmation. After all, the dynamics of volume tells us better than anything how active the trading is. This is a unique knowledge which is not really provided by other indicators. As a result, the indicators of volume will surely make a great contribution to your trading system.
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