No. We may backtest EAs only in MetaTrader.
For example: we have some idea, this idea was coded by somebody and we may test the EA only. We can not backtest idea.

Idea may be the following: two indicators are crossing ....
How to estimate the idea without EA creating.

Or an other example:
- somebody said: I have an idea about some indicators, crossing and so on. And I received a great profit every day. Can you create EA?
- some people created EA and it was not profitable at all.
- why? Bad coding or bad idea?
Because nobody can estimate or backtest ideas before coding in MetaTrader.
We may provide forward test in MT to trade manually on demo account to say: this idea is profitable. Will anybody believe?

Look at this section http://www.forex-tsd.com/a/. A lot of ideas and authors of the ideas said that it is profitable ideas. How to estimate it? We may ask them to estimate ideas but demo testing 24/7 without any EA during the several month on H4 timeframe for example ...

So, some people made this software to do this for 5 minutes.