What would be a good filter for a Mean-Reverting system?

Discussion in 'Strategy Building' started by Oadmani, Sep 10, 2021.

  1. If losing 'streaks' are the primary issue, then employ some methodology to stop taking positions after e.g. 3 losing trades in a row, and wait for a virtual winner then start to trade again. This will protect you from a long series of losing trades, but will also mean you miss out on each winning virtual trade, which may affect your overall w/l ratio. You'd need to back-test the approach to understand how it impacts you overall. Back-testing it will also allow you to understand the optimum 'losers in a row' cut-off. As always with back-testing though, it's no guarantee of future performance.

    TDUK
     
    #41     Sep 11, 2021
    yc47ib likes this.
  2. I also had to re-read this post. You are now stating a win ratio of 61.79 at a positive risk/reward of 1:1.5, i.e. you gain 1.5 for every 1 you risk?

    That's VERY different to the aforementioned 67% win rate, at 1:1.

    So what is it, or is this two different approaches?

    Your 61.79% win rate at 1:1.5 is very close to the implied odds by that win rate of 60%, and I expect that spreads and commissions would negate any perceived edge.

    TDUK
     
    #42     Sep 11, 2021
  3. Oadmani

    Oadmani

    I thought about doing this. However, a lot of the losing streaks happen in clusters. For instance, in the covid crisis, the markets panicked, and 10 stocks together met the criteria for an entry of a mean-reversion trade on the long side. Now, the market went down further, and all of them turned out to be losses. There is simply no way to predict this, since the losing streak didn't happen one by one, but all the trades appeared together. I was thinking, if I get more than X number of trades, within 2 days, X being, say, 6...then I manage risk by exiting all the positions and don't take new positions. Of course, that could also mean that all of those trades become profitable, but it still mitigates the risk.

    The other way of course is to follow the fundamentals, and if the market is about to crash, I avoid taking trades. The issue is that we cannot short stocks here, so where I could be trading in 40 stocks at a time and risk around 2.5 percent of the capital-- both long and short-- I can only take half of those trades, as shorting is not allowed on stocks here. Also, besides this limitation, I cannot also be profitable when the market collapses, and balance out my portfolio from the long side by shorting. So, the only option is to either follow the fundamentals or use some other trick.
     
    #43     Sep 11, 2021
  4. Oadmani

    Oadmani

    I meant the average gain/average loss ratio is 1.5:1.
     
    #44     Sep 11, 2021
  5. I don't think this is going anywhere and I don't want to take the thread too far off your original topic, so I'll butt out now. Best of luck to you.

    TDUK
     
    #45     Sep 11, 2021
  6. .

    Oadmani,

    Lots of good suggestions in this thread... I agree especially with the ideas put forth by Tomorton, Fonz and NazSherpa that moving averages can be used to improve mean reversion systems. Simply choosing not to take long trades when the slope of a medium-term moving average is down will eliminate lots of bad trades.

    You mentioned the Covid correction last year... the attached chart shows how one could have avoided taking long trades during the retracement.


    mean reversion w medium-term MA2_PNG500.png
     
    #46     Sep 11, 2021
    Oadmani and NazSherpa like this.
  7. One more example using an index:

    mean reversion w medium-term MA_PNG500.png
     
    #47     Sep 11, 2021
    Oadmani and NazSherpa like this.
  8. +1. Here's a long mean reversion system I actually trade. Green line = with index filter, Red line = without index filter. Index filter is just close of SPX index is above its 100 day simple moving average. Doesn't have to be complicated. Kind of missed out going long in 2008 though. :)
    upload_2021-9-11_22-41-7.png
     
    Last edited: Sep 11, 2021
    #48     Sep 11, 2021
    Oadmani likes this.
  9. Study option prices at the money. Support/resistance is key. News is key. Learn what news matters.
     
    #49     Sep 11, 2021
  10. Handle123

    Handle123

    For me most important is losing percentages, I can do very well with 15% winning percentages so long as breakeven percentages are 80% using hedges.

    1:1.5 risk/reward and doing 62% is slow equity curve.
    Examples of price movement to wait for better entries are H&S, or deep retracement within uptrend then higher low, risk exits would be recent lows and targeting highs.
    Chart patterns work well and although some don't like Bollinger bands, combining trendlines with BB can help.

    Just remember though, "volume" drives price, if you the only one getting Long, keep tight stops.
     
    #50     Sep 11, 2021
    Oadmani likes this.