Add replacing functionality to existing indicators

[iam-rohid]

• [x] ABANDS
• [ ] AC
• [ ] ADX
• [x] AO
• [ ] ATR
• [ ] BBANDS
• [ ] BBW
• [ ] CCI
• [x] CG
• [x] DEMA
• [x] DMA
• [ ] DX
• [x] EMA
• [x] MACD
• [x] MAD
• [x] MOM
• [ ] OBV
• [ ] ROC
• [x] RSI
• [x] SMA
• [ ] STOCH
• [ ] TR
• [x] WSMA