Help implementing a trading system

[cunparis]

I'd like to implement a simple trading system and I'm kind of stuck. I think I understand the basics of ninjatrader's strategies and I've been writing basic little strategies and backtesting them. But I cannot figure out how to get this into a system.

The system is to take the S&P 500 and buy max 3 stocks with the lowest stoch, and the stoch must be under 20. These would be held until loss, profit, or time stop is hit and then a slot would open up to buy another one (up to max 3).

I can see how NT will run a strategy against a symbol or even an instrument list, but that seems to be it. Unless I'm really missing something. To me it seems very adapted to running individual strategies on specific instruments. But how does that fit into a working system with money management?

If this is covered somewhere please just point me in the right direction. I've looked but didn't find it.

Thanks

[NinjaTrader_Ben]

Hello,


Multi time frames and instruments within one strategy is possible:

http://www.ninjatrader-support.com/HelpGuideV6/MultiTimeFrameInstruments.html

However this will take advance programming.

[cunparis]

Hello,


Multi time frames and instruments within one strategy is possible:

http://www.ninjatrader-support.com/HelpGuideV6/MultiTimeFrameInstruments.html

However this will take advance programming.

It's me again, I'm back. I've been looking around at other products and I keep coming back to Ninjatrader. I'd really like to get this to work with Ninjatrader and I don't mind advanced programming (at this point I don't think any product can do it without advanced programming).

Can you give me some more hints? I'm reading the documentation but I'm still not sure how to do it. Let me break the system down into parts:

1 - scan the S&P 500 for the lowest 3 stoch values
2 - determine a stop level - could be a set percentage, could be x day low, could be low of previous bar, etc.
3 - Determine how many shares to buy. This would be done by using 2% of the account value as the maximum risk, dividing that amount by the risk of the trade per share, which gives the number of shares.
4 - Buy the stock(s)
5 - Exit on criteria

If someone could give me some pointers for each of these steps, I'll read through the documentation and search the forums and try to get up to speed on it. It could be a group effort if others are interested.

Thanks

[NinjaTrader_JoshP]

1. Use multi-instrument strategy. Add("^SP500", PeriodType.Minute, 1);
2. You will need to program logic to figure that out yourself.
3. Use AccountSize to run your calculations off of.

[cunparis]

1. Use multi-instrument strategy. Add("^SP500", PeriodType.Minute, 1);
2. You will need to program logic to figure that out yourself.
3. Use AccountSize to run your calculations off of.

Thanks for the pointer on the multi-instrument strategy. This multi-instrument makes sense to me.

However, I don't see how I can find the 3 stocks from the S&P 500 (or any other instrument list) with the lowest stoch value.

Would I have to do this:

    Add("AAPL", PeriodType.Minute, 1);

for each of the 500 stocks and then sort them by the EOD stoch value? Is there an easier way?

[NinjaTrader_Ray]

Correct, you would have to add 500 stocks to the strategy.

[cunparis]

Correct, you would have to add 500 stocks to the strategy.

Ok, I think I understand what I need to do now. I thought there would be less programming involved but at least the programming seems relatively straightforward to me.