Saving Tick Data

[spacebalts67]

How do I make sure that daily tick data is stored to my computer. It seems that some days when I backtest a strategy, tick data is automatically stored, and some days it is not. I'm not sure what I am doing differently on these days and would like to know how to store daily tick data, perhaps automatically without even having to be backtesting that day. A free source for historical forex tick data would also be good if one is known.

Also, how do you incorporate a spread for forex trading into your backtesting and how exactly does this work?

Thanks

[NinjaTrader_Ray]

Tick data is always stored on your PC as it is loaded from a connection that supports historical data. You could introduce slippage at the time you run a backtest. This is set in the strategy dialog window when running a backtest.

[spacebalts67]

I don't know what slippage means and I don't know what connection would support historical data. I'm asking (since forex.com only gives 24 hours of historical data), how I save that data to my computer.

[NinjaTrader_Ray]

Tools > Account Connections

Select your GAIN connection, then change the historical data access to use "NinjaTrader servers" --> You will now get more than 24 hours data.

http://www.investopedia.com/terms/s/slippage.asp

[spacebalts67]

I have done this and still I get spotty historical data. When I run a backtest I only get trades from 3 days in the last month (I assume days in which I ran backtests that data was saved) I just don't know how this data was saved.

I thought ninjatrader did not have historical forex data for backtesting? Do you have tick data? Thanks

[NinjaTrader_Ray]

If you have done this and the data is not sufficient, then you can look at eSignal or DTNiQ as add on service for historical FX data.

[spacebalts67]

How far back does ninjatrader have historical tick data for forex?

[NinjaTrader_Ray]

At least 1 year.

[spacebalts67]

Ok, so changed my historical data feed to ninjatrader servers and still I only get 24 hours of historical data. What gives? (this is for forex through gain capital)

[NinjaTrader_Dierk]

>> Ok, so changed my historical data feed to ninjatrader servers
- how exactly did you you do that?
- try Tools->Historical data->Reload
- which connection are you connected to as you try?