Hi,
Thanks to everyone for contributing.
I've removed one more fundamental error in my backtesting calculations as I spotted in my previous post!
Note that my numbers are approximate and are meant to give me an idea of order of magnitude and comparison between the different intervals. There still could be some fundamental errors in my calculations
For gbpusd 2004, 1 min data from forexite. I tested
1) Use midnight as a pivot everyday. If price goes down, buy, if price goes up, sell.
2) Use midnight as a pivot everyday. Buy and sell if price goes up or down.
3) Use start of year as pivot. Buy and sell if price goes up or down.
Overall for the same interval spacing (0.0100 to 0.0020), 2) was better than 1) for profitability/Max Drawdown and 3) was better than 2).
For 2004 gbpusd, method 3) I found that 0.0070 gave the best result. I also wrote a program to backtest trading at certain percentages. Excel was way too slow with having to recalculate the unrealised p/l for nav for every single trade!
Trades:608
pips realised:40,390
Unrealised:-22,950
Starting with $10000 balance @ 0.10% nav per trade : 12110.69
unrealised : -1237.48
nav: 10873.21
% profit : 8.7%
Max DD Bal : $ 9716.55
% DD : 2.83%
Profit/DD :3.08
When scaled to 0.30%
Bal: 16914.62
Unrealised:-4312.01
NAV:12602.61
% profit :26.0%
Max DD Bal : $ 9135.46
% DD : 8.65%
Profit / DD: 3.01
I then tested 2003 gbpusd
@ 0.0070 intervals
Trade:399
pips:25,340
unreal pips:-44,415
Bal:$11288.62
Unrealised:$-2293.19
NAV:$8995.43
%profit:-10.0%
MaxDD Bal: $9162.61
% DD: 8.37%
Profit / DD:-1.20
Profit / DD for:
0.0100 : -1.15
0.0080 : -1.00
0.0070 : -1.20
0.0060 : -0.95
0.0050 : -0.95
0.0040 : -0.91
0.0030 : -1.17
0.0020 : -0.89
So even though in the first half of 2003, gpbusd moved up and down, that last uptrend in nov/dec produced the 'nav' loss at the end of the year. Max nav for 0.0070 was at 7/11/03 with nav of 10624.41.
So my conclusion is that trading one currency using a pure fixed grid is probably not a good idea
I believe that other currencies & rules need to be added to a pure fixed grid to increase profitability.
Best regards
Alan
Thanks to everyone for contributing.
I've removed one more fundamental error in my backtesting calculations as I spotted in my previous post!
Note that my numbers are approximate and are meant to give me an idea of order of magnitude and comparison between the different intervals. There still could be some fundamental errors in my calculations

For gbpusd 2004, 1 min data from forexite. I tested
1) Use midnight as a pivot everyday. If price goes down, buy, if price goes up, sell.
2) Use midnight as a pivot everyday. Buy and sell if price goes up or down.
3) Use start of year as pivot. Buy and sell if price goes up or down.
Overall for the same interval spacing (0.0100 to 0.0020), 2) was better than 1) for profitability/Max Drawdown and 3) was better than 2).
For 2004 gbpusd, method 3) I found that 0.0070 gave the best result. I also wrote a program to backtest trading at certain percentages. Excel was way too slow with having to recalculate the unrealised p/l for nav for every single trade!
Trades:608
pips realised:40,390
Unrealised:-22,950
Starting with $10000 balance @ 0.10% nav per trade : 12110.69
unrealised : -1237.48
nav: 10873.21
% profit : 8.7%
Max DD Bal : $ 9716.55
% DD : 2.83%
Profit/DD :3.08
When scaled to 0.30%
Bal: 16914.62
Unrealised:-4312.01
NAV:12602.61
% profit :26.0%
Max DD Bal : $ 9135.46
% DD : 8.65%
Profit / DD: 3.01
I then tested 2003 gbpusd
@ 0.0070 intervals
Trade:399
pips:25,340
unreal pips:-44,415
Bal:$11288.62
Unrealised:$-2293.19
NAV:$8995.43
%profit:-10.0%
MaxDD Bal: $9162.61
% DD: 8.37%
Profit / DD:-1.20
Profit / DD for:
0.0100 : -1.15
0.0080 : -1.00
0.0070 : -1.20
0.0060 : -0.95
0.0050 : -0.95
0.0040 : -0.91
0.0030 : -1.17
0.0020 : -0.89
So even though in the first half of 2003, gpbusd moved up and down, that last uptrend in nov/dec produced the 'nav' loss at the end of the year. Max nav for 0.0070 was at 7/11/03 with nav of 10624.41.
So my conclusion is that trading one currency using a pure fixed grid is probably not a good idea
I believe that other currencies & rules need to be added to a pure fixed grid to increase profitability.
Best regards
Alan
There is a chat area on the platform if anyone wants to talk live with me (I am there 24 hrs a day, and can be grouchy if you wake me). You got to download it though, and maybe some of you prefer not to.