Does the tick volume depend on my broker?

Is the tick volume changing from one broker to another one, for a given currency pair and a given time ?

Changing tick rates affect the efficiency and profitability of the investment strategy and should be evaluated periodically. The first step in evaluating the effect of a tick rate change is to look at the relationship between the current tick rate and the historical volatility of the portfolio. The volatility is measured by the difference in the closing price between the last trade and the current one, multiplied by the number of days since the previous close. Historical volatility measures the range of difference over time rather than the absolute value of the rate because of short time periods.

By calculating the average closing price over the duration of the trading day, we can determine the expected tick rate. If the expected tick rate falls below the average, the trader will be advised to sell. On the other hand, if the expected tick rate rises above the average, it is better to buy since it may signal that the stock is overpriced. A rise in volatility could also be caused by market makers who take advantage of the bid/ask spread. They make a large profit by taking the spread between the bid and asking price. If volume increases, this means that these market makers are now increasing their bid price to match that of the market.

Another factor that affects the profitability of a trade is the spread between the actual ticker-out and the next trade day's tick rate. As a result, if the spread changes, the cost of trading increases since the investor will have to pay more for each trade. Changing from one broker to another is an easy way to improve profitability but it must be done carefully so as not to cause market imbalance. Before making a move to change the tick rate, it is important to understand the risk factors associated with the new higher or lower rate.

so it's a yes ?

If so, a big broker dealing with big clients should have a very representative tick volume ? What are the big brokers for the pros and institutions who also offer an access to tiny retailers?

Yes. Example: The tick volumes in E/U for the past month from my two brokers are: 1068082 vs. 1318326.
And I prefer brokers with higher tick volumes over those with lower.

cool, can you give me a list of brokers with high tick volumes. I am too new to know this kind of stuff.

Here you can evaluate for yourself: https://www.myfxbook.com/forex-broker-volume

Click on the names or numbers..

In europe, I only found IG to have big tick volume. Are there other big EU brokers? Perhaps one for institutions but which also offer a service to retailers.

Short answer is "Yes". Long answer is that the FX market is decentralized and any (and all) volume including tick volume is generated by the individual bank operating as the liquidity provider. Thus many different banks will generate differing tick volumes...and that's not to mention whether your broker is giving you the volume from the actual liquidity provider or the internal tick volume from their own system platform.

Does it mean I should choose to trade CFDs which are not manufactured by market makers as their own derivative symbol but CFDs that hook up to futures data in real time and work purely on commission?

Most of the CFD brokers are market makers and trading break hours give them open license to bust thin margin accounts.

I'm afraid I cannot tell you (or recommend) which market is "best" for you to trade. I am merely answering the question posted here. Again there is NO centralized exchange in FX and thus you will never get the kind of volume information that most futures traders are accustomed to. However this doesn't mean that the provided tick volume is useless. I have dedicated several threads to this very topic. What is more important (no matter which market you choose) is to find a data feed provider that is transparent and as honest (read strictly regulated) as possible. I do not "recommend" or point you to any particular agency or company. I simply try to provide information to help you make your own decisions based on your own individual best interests.

I've run tests with 10 different popular forex brokers. They all had different delta volumes. But strangely, all of their 'total volumes' were the same. Where total volume = ask ticks + bid ticks and Where bid tick is a change in the bid price, and ask tick is a change in the ask price.