Why does my TS show a signal to sell, but no one is selling?
Kudos to you for managing to develop your own trading system. Now it is time to start testing it. Even the development of a unique trading system does not guarantee that the owner of the system will start making money in forex.
A good trading system should skillfully give signals both in a trend and in a trading corridor (which is sometimes called a sideways trend).
If your TS works well only in a corridor, it will always tell you to sell when it gets to the upper boundary of the corridor. And when the bulls will break through the level, it will start shouting that a unique moment to sell has arrived. In reality, however, it is dangerous to enter a bearish trade when this level is broken through because you will start losing money as soon as the level is broken through. The situation will be exactly the same when you break the support level.
The trend trading system will cheat you the moment the quotes are locked into a narrow corridor. When approaching the upper boundary of the corridor the system will give a signal to buy, and for the corridor this is the perfect place to sell. As a result, you will be constantly chasing the market, lagging behind profitable traders by several steps.
Why else would trading system signals mislead a trader? Some developers create TSs, which work fine only at certain intervals. For example, a trading system can give good signals only on the hourly chart. And if one tries to adapt it with the programmed parameters on the 15-minute chart, the trader can expect problems.
Quite often the market starts growing unnoticeably on small intervals, and later bigger players catch the beginning of the movement. Then the increase in quotations becomes visible even on the hour and higher charts.
Other trading systems may be solely suitable for trading the Euro against the US dollar, while the GBP against the same dollar may give false signals.
What should be done first? After development, proceed to the testing phase on a demo account. Do not invest real money until you are sure that the signals are indeed correct. Therefore, move on to trading with real money only after the final testing and obtaining profitable results.