Hi all
I have been quiet on the forum for the last month, as I have been trading GBP on Globex, as some of you may know. The object of the exercise so far has been to compare actual results with those predicted by the backtesting program (SureTracker) that produced various results on JonnyT's break out methods. Questions are often asked about slippage, and whether backtested results are realsitic and achievable in practice, so at least I now have some real comparisons which I have posted here for all to see.
The 1-8 BO was used, 70 pip stop with a 2 hour qualifier, exit generally 20h30, sometimes earlier. No commission is included, but with 1 contract traded, IB charge $6, which equates to 1 pip per trade approx (1 pip actually = $6.25) . DNT means "did not trade" in other words I was not able to trade. NT means "no trade" ie no trade signal generated within 2 hours. Data used for the theoretical was spot data from Dukas, futures data from IB. Entry orders were stop limits and exits were time/market or stop limit stop outs.
I also attempted to make a comparison with historical futures (trade) data, but feel that this data is just too thin for GBP futures to come up with anything accurate. If I had the historical futures bid and ask prices then that would be useful, but I've never seen it offered anyhwere.
I think that the correlation is good enough to have reasonable confidence in previously posted backtested results, for a 70 pip stop and hourly data used for the theoretical. On only 2 days was a signal generated on 1 side not the other, but never did the signals conflict in direction. This occurred as the shape of the spot and futures charts is never identical, with occasional (temporary), sometimes quite large misalignments. The results follow, but one polite request, please do not send a deluge of PMs asking further questions, as I will attempt to answer any here.
rog1111
Date Actual Theoretical
21/06/2004 0.0009 0.0015
22/06/2004 0.0016 0.0016
23/06/2004 0.0026 0.0026
24/06/2004 DNT -0.0070
25/06/2004 NT NT
28/06/2004 NT -0.0009
29/06/2004 0.0109 0.0115
30/06/2004 0.0033 0.0038
01/07/2004 -0.0071 -0.0070
02/07/2004 NT NT
05/07/2004 DNT 0.0012
06/07/2004 NT NT
07/07/2004 0.0047 0.0049
08/07/2004 -0.0069 -0.0070
09/07/2004 -0.0070 -0.0070
12/07/2004 0.0027 0.0029
13/07/2004 NT NT
14/07/2004 -0.0028 -0.0030
15/07/2004 -0.0072 -0.0070
16/07/2004 0.0188 0.0191
19/07/2004 0.0016 0.0014
20/07/2004 0.0100 0.0101
21/07/2004 -0.0072 -0.0070
22/07/2004 -0.0068 -0.0070
23/07/2004 0.0062 0.0059
26/07/2004 0.0013 0.0017
27/07/2004 -0.0068 -0.0070
28/07/2004 -0.0023 -0.0027
29/07/2004 0.0067 0.0058
30/07/2004 0.0024 NT
02/08/2004 -0.0004 -0.0012
03/08/2004 -0.0068 -0.0070
04/08/2004 -0.0068 -0.0070
I have been quiet on the forum for the last month, as I have been trading GBP on Globex, as some of you may know. The object of the exercise so far has been to compare actual results with those predicted by the backtesting program (SureTracker) that produced various results on JonnyT's break out methods. Questions are often asked about slippage, and whether backtested results are realsitic and achievable in practice, so at least I now have some real comparisons which I have posted here for all to see.
The 1-8 BO was used, 70 pip stop with a 2 hour qualifier, exit generally 20h30, sometimes earlier. No commission is included, but with 1 contract traded, IB charge $6, which equates to 1 pip per trade approx (1 pip actually = $6.25) . DNT means "did not trade" in other words I was not able to trade. NT means "no trade" ie no trade signal generated within 2 hours. Data used for the theoretical was spot data from Dukas, futures data from IB. Entry orders were stop limits and exits were time/market or stop limit stop outs.
I also attempted to make a comparison with historical futures (trade) data, but feel that this data is just too thin for GBP futures to come up with anything accurate. If I had the historical futures bid and ask prices then that would be useful, but I've never seen it offered anyhwere.
I think that the correlation is good enough to have reasonable confidence in previously posted backtested results, for a 70 pip stop and hourly data used for the theoretical. On only 2 days was a signal generated on 1 side not the other, but never did the signals conflict in direction. This occurred as the shape of the spot and futures charts is never identical, with occasional (temporary), sometimes quite large misalignments. The results follow, but one polite request, please do not send a deluge of PMs asking further questions, as I will attempt to answer any here.
rog1111
Date Actual Theoretical
21/06/2004 0.0009 0.0015
22/06/2004 0.0016 0.0016
23/06/2004 0.0026 0.0026
24/06/2004 DNT -0.0070
25/06/2004 NT NT
28/06/2004 NT -0.0009
29/06/2004 0.0109 0.0115
30/06/2004 0.0033 0.0038
01/07/2004 -0.0071 -0.0070
02/07/2004 NT NT
05/07/2004 DNT 0.0012
06/07/2004 NT NT
07/07/2004 0.0047 0.0049
08/07/2004 -0.0069 -0.0070
09/07/2004 -0.0070 -0.0070
12/07/2004 0.0027 0.0029
13/07/2004 NT NT
14/07/2004 -0.0028 -0.0030
15/07/2004 -0.0072 -0.0070
16/07/2004 0.0188 0.0191
19/07/2004 0.0016 0.0014
20/07/2004 0.0100 0.0101
21/07/2004 -0.0072 -0.0070
22/07/2004 -0.0068 -0.0070
23/07/2004 0.0062 0.0059
26/07/2004 0.0013 0.0017
27/07/2004 -0.0068 -0.0070
28/07/2004 -0.0023 -0.0027
29/07/2004 0.0067 0.0058
30/07/2004 0.0024 NT
02/08/2004 -0.0004 -0.0012
03/08/2004 -0.0068 -0.0070
04/08/2004 -0.0068 -0.0070
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