These longer TF strategies would need to work over months and years
No they don’t. Just because you are using a daily chart does not mean you have to be in the market for months. You can be in for seconds if your stop and limit orders and the market decides that that is what is going to happen.
Sorry @Vonasi, I meant that for systems based on longer TF there would be fewer trades initiated in a shorter amount of backtesting, not that trades would be in the market for long periods. In order to generate a meaningful number of trades to increase confidence in backtest results these higher TF strategies need to be tested over much longer times. I like to see a minimum of 100 trades in any backtest to feel any level of comfort, and I would prefer it to be a lot higher.
