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Monday, January 25, 2010

Pros And Cons of Forex Metatrader 4 Demo and Back-Testing

By Steve Via

When you want to determine if a trading system is going to be valuable to you, you must preform back testing and demo-ing. This is based on the theory that if a strategy worked well for others, it will work well for the new user. On the other hand, if a strategy did not work well for others, it will fail to work well for the new user.

There are pros to using back testing and demo-ing to review a system.

1. Trends tend to repeat. The back-test shows recurring cycles.

2, Max draw-down ratios can be provided to investors, letting them know exactly what these systems can provide them.

3. Knowing how a system preforms allows an investor to have more assurance when a draw-down period hits. In other words, an investor will know when sticking to the trading rules will be in his/her best interest and when he/she should forget about using the trading system.

4. Using back-testing investors can replicate the performance statistics of a system, allowing them to accurately estimate the probability and magnitude of any possible trade profits.

Disadvantages of Backtests and Demos

1. Ranges

Worldly circumstances sometimes create fluid situations which diminish the ranges. Fluid situations will vary the ranges between GMT day and night. These fluctuations are not always reported when doing research before bidding at a certain price.

When back-testing, you won't be able to tell as well just how these conditions will turn out, making them unreliable.

2. Counterbalancing GMT

The server time could change due to summer and winter daylight saving hour in the UK and US. This can cause price and history feeds to vary from the specified chart timing. This can result in mismatched figures from strategies that specify trade hours.

3. Brokers' Control

Agents will use demo-ing and back testing to present the best possible option. Live trading does not reflect such perfect scenarios. Agents manipulate the data to make their skills more appealing, thereby attaining more customers. The Internet has a wealth of information regarding forex forums.

4. Method of Entering Trades

A system that utilizes market order to make entries may find that it is difficult to get the proper price requested when in live trade conditions. In truth, in live trading conditions, the marking price is constantly changing, making it very difficult to make a manual trade at a specific price. Entry prices in back tests or demo tests will vary from that of live conditions.

Conclusion

Identifying the pros and cons of demo-ing and back-testing offers us the opportunity to review and determine which program stands out among the rest. All this information does not indicate that the tried-and-true method of back-testing is obsolete. - 23200

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