1) Series of Losing Trade
If you noticed that the losses you had are more in a series of trade you took then take a break. If you proceed you will start doing revenge trading and lose out. A break will help you re-evaluate yourself and maintain psychological and emotion balance.
Honestly the emotion after a series of losing streaks prompt a trade to continue trading so as to recover those losses unfortunately most of those trades entry is not according to the trading strategy most of the time I do trade blindly unfortunately or consequently resulted to more losses understandable now that the best thing or remedy is to take a break.
2) Market is Consolidating
Surely there is no direction in the Market once it is consolidating. This will waste your time and make you make irrational decisions.
Truly trading in a ranging market is very frustrating except if the trader is a scalper, unfortunately one has to be an experience trader to become a scalper, ranging market is nightmare for swing traders, the best bet is to continue to observe the market till a fundamental news is released which would definitely move the market.
3) When Emotionally Unstable
Are you angered, troubled, disturbed, or even excited etc. At that point don't engage the market.
This is a very bad idea ie trading when angry it would lead to losing streak if care is not taken, in case of such a scenario the trader should never trade until the anger subsided.
5) When your set-up is not established
You know your pattern of trade and your set up more than I do. Once this set up has not been confirmed or has past don't trade. Don't help the market.
I adopted two model of step up which I only implement if the price of the traded pair form that patterns or model once the setup is confirmed I place a trade with Stop loss and take profit target.