Strategies / Trend / T3 Trailing Band Williams Filter

T3 Trailing Band Williams Filter

The system buys when a Tillson T3 average of close moves above a trailing band and Williams %R(3) is above -20. It closes the long when T3 falls below the lower band and Williams %R is below -70.

TrendLong onlySwingS&P 5001 hour

1.99Profit factor

4,648Net profit EUR

39.04%Win rate

146Trades

-1,121Max drawdown

31.84Avg trade

Best run of 48. S&P 500, 1 hour, spread 1, from run pf:2026-10-12-USA500-1h.tsv:4.

Entry rules, long

Williams %R(3) is above -20.

Exit rules

T3 is below the lower trailing band (trailing line times 0.994) and Williams %R(3) is below -70.

Test conditions

Period	Up to 2026-10-12
Instrument	S&P 500, 1 hour
Spread	1 points
Starting capital	1,000,000
Costs	Spread only. Commissions and overnight financing are not included.
Bars	Up to 200,000 bars, fewer where the instrument has less history
Last tested	2026-10-12

Every run

Markets and timeframes tested

Market	Timeframe	PF	Trades	Win %	Net	Max DD
S&P 500Best run	1 hour	1.99	146	39.04	4,648 EUR	-1,121
USD/JPY	4 hours	n/a	32	43.75	360,310 USD	-348,620
EUR/USD	1 hour	n/a	11	72.73	70,921 USD	-41,560
EUR/USD	4 hours	n/a	36	44.44	70,130 USD	-32,620
Nikkei 225	Daily	n/a	247	42.91	38,212 USD	-12,245
Nikkei 225	3 min	n/a	4	75.00	35,327 USD	-13,081
Silver	4 hours	n/a	390	41.03	35,148 USD	-14,373
Nikkei 225	15 min	n/a	50	44.00	28,689 USD	-14,651
Nikkei 225	30 min	n/a	96	39.58	25,483 USD	-11,646
Nikkei 225	10 min	n/a	17	52.94	24,051 USD	-9,194
Silver	3 min	n/a	52	44.23	22,739 USD	-15,814
Nikkei 225	2 min	n/a	1	100.00	22,616 USD	-13,121
Nikkei 225	5 min	n/a	11	63.64	22,539 USD	-13,498
Silver	10 min	n/a	93	54.84	18,512 USD	-12,443
Dow Jones	Daily	n/a	286	38.81	17,769 EUR	-8,835
Dow Jones	30 min	n/a	36	47.22	17,741 EUR	-8,932
DAX 40	15 min	n/a	36	50.00	15,660 EUR	-4,118
Dow Jones	1 hour	n/a	39	41.03	15,466 EUR	-6,514
Nasdaq 100	Daily	n/a	262	41.60	14,822 EUR	-5,372
Silver	5 min	n/a	64	42.19	13,641 USD	-11,685
Nasdaq 100	4 hours	n/a	261	41.00	13,075 EUR	-5,642
Nasdaq 100	1 hour	n/a	231	41.13	12,681 EUR	-5,161
DAX 40	Daily	n/a	327	44.34	12,468 EUR	-4,222
Dow Jones	5 min	n/a	2	50.00	10,878 EUR	-5,661
Dow Jones	4 hours	n/a	50	40.00	10,564 EUR	-7,308
Nasdaq 100	5 min	n/a	6	50.00	10,545 EUR	-4,089
Dow Jones	3 min	n/a	3	66.67	10,056 EUR	-5,673
Dow Jones	10 min	n/a	6	50.00	9,245 EUR	-5,645
Nasdaq 100	30 min	n/a	131	37.40	9,203 EUR	-4,949
Nasdaq 100	15 min	n/a	63	39.68	8,508 EUR	-6,218
Nasdaq 100	2 min	n/a	1	100.00	6,336 EUR	-3,756
Nasdaq 100	3 min	n/a	5	60.00	5,507 EUR	-3,758
DAX 40	3 min	n/a	2	100.00	5,043 EUR	-3,630
S&P 500	30 min	n/a	83	39.76	3,831 EUR	-1,282
DAX 40	5 min	n/a	3	100.00	3,324 EUR	-1,841
FTSE 100	30 min	n/a	52	44.23	2,996 EUR	-2,472
S&P 500	15 min	n/a	40	45.00	2,983 EUR	-1,544
S&P 500	Daily	n/a	297	37.37	2,795 EUR	-1,015
FTSE 100	3 min	n/a	1	100.00	2,661 EUR	-1,262
FTSE 100	5 min	n/a	1	100.00	2,638 EUR	-1,260
S&P 500	4 hours	n/a	177	38.98	2,561 EUR	-1,024
S&P 500	5 min	n/a	3	33.33	2,484 EUR	-694
S&P 500	10 min	n/a	12	41.67	2,464 EUR	-857
DAX 40	2 min	n/a	1	100.00	2,198 EUR	-1,831
Gold	Daily	n/a	250	40.00	2,193 EUR	-1,344
Gold	4 hours	n/a	163	46.01	1,920 EUR	-1,055
S&P 500	2 min	n/a	1	100.00	1,187 EUR	-699
Gold	1 hour	n/a	96	46.88	907 EUR	-852

Charts

Results by run

Top 10 of 48 runs. The full list is in the table above.

Net profitMax drawdown

The code

ProBuilder code, as tested

// ==============================================================
// T3 Trailing Band Williams Filter
// ProRealAlgos Strategy Library  |  prorealalgos.com
// Type: Trend
// Direction: Long only
// Timeframe tested: 1 hour
// ==============================================================

DEFPARAM CumulateOrders = false

ONCE var = 0
ONCE varinit = 0
ONCE ls = 0
ONCE ss = 0
ONCE dir = 1
ONCE ottinit = 0

opt = 0.1
ea = ExponentialAverage[5](close)
eb = ExponentialAverage[5](ea)
ec = ExponentialAverage[5](eb)
ed = ExponentialAverage[5](ec)
ca = -opt * opt * opt
cb = 3 * opt * opt + 3 * opt * opt * opt
cc = -6 * opt * opt - 3 * opt - 3 * opt * opt * opt
cd = 1 + 3 * opt + opt * opt * opt + 3 * opt * opt
tt = ca * ed + cb * ec + cc * eb + cd * ea

valpha = 2 / (5 + 1)
vud = max(close - close[1], 0)
vdd = max(close[1] - close, 0)

73 more lines: the entry and exit rules.

Setup

How to load it

Copy the code with the copy button on the code block.
In ProRealTime, open a chart of the instrument and timeframe you want to test, then open ProOrder > New trading system and choose "Create with programming".
Paste the code, give the system a name and save it.
Click "Backtest", set your own spread and position size, and run it before you consider trading it live.

Indicators used

Williams %R

Read this firstKnown weaknesses2 points

The code sets no stop loss, so a losing trade stays open until an exit signal arrives.
Results include the spread only. Commissions and overnight financing are not included.

Questions

About this strategy

Can I run T3 Trailing Band Williams Filter in ProOrder?

Yes. The code is ProBuilder and runs as an automated ProOrder system. Backtest it on your own account with your own spread and position size before trading it live.

Which markets was it tested on?

It was tested on 48 market and timeframe combinations. The best run was S&P 500, 1 hour, with a profit factor of 1.99 over 146 trades.

How large was the drawdown?

The best run had a maximum drawdown of 1,121 EUR at the tested position size, against a net result of 4,648 EUR.

Does it trade long, short or both?

It only takes long trades.

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Past backtest results do not guarantee future results. This is not financial advice. Curated and maintained by ProRealAlgos. ProRealTime™ is a trademark of ProRealTime SAS. prorealalgos.com Stats Docs