I've always had interest in developing a real automated trading system, but everything out there right now is garbage since they rely on technical indicators.
Without getting too 'philosophical' everything are indicators, even charts/candles are indicators. What most people dont comprehend is that technical indicators work exactly as they should yet most dont understand HOW they work and for what purposes. Another aspect is that every 'indicator' has a flaw, but of course if one dont understand its true purpose then how can they identify its flaws?
With the right indicators (and understanding behind them) one can build robust systems, be them manual or algorithmic.