Dislikedtell you what.. if they step in I'll fade the move.. thats my game planIgnored
1. First wait out until the intervention is over and the market has calmed down a bit (go see charts from previous interventions so you know what to look for).
2. Also, make sure that the yen stays bought after the intervention. If yen weakness happens to coincide with the intervention flows you're in a lot of trouble. Personally I would even go as far as using a currency relative strength indicator just to make sure that the yen isn't weakening versus other pairs other than the one you're trading.
3. And, of course, don't over-commit yourself. Don't under-commit either.
4. Have a little patience. For all the risks you will be taking, don't give away your position for a stupid stop run (yen is very prone to 50+ pip spikes for around a week after the intervention due to ultra-tight stops). Protect your profits, but don't make it too easy for those stop-runners.
If you don't risk, you don't ever have to lose.