Replace and "What if" Scenarios

[ozum]

Hi,

In the README I saw the replace feature:

// You can replace a previous value (useful for live charts):
sma.update('40', true);

However, it is unavailable for indicators such as DX. Any suggestions on replacing the last candle and the result of DX?

const dx = new DX(14);

// I want to see results for what-if scenarios.
const dxA = dx.update( { high: 10, low: 3, close: 2 } );

// I want to see the result without the previous update
const dxB = dx.update( { high: 8, low: 2, close: 6 }, true );

Thanks,

[bennycode]

Hi @ozum, the "replace" functionality is not yet available for all indicators. It's an early draft by @iam-rohid and myself and we are open to suggestions and Pull Requests.

[ozum]

I have some thoughts, but first could you please check #668? If my findings in #668 are true, I will shape my suggestion accordingly.

[bennycode]

Hi @ozum, the DX indicator doesn't have the "replace" functionality yet. To build it, it would be necessary to cache all its internal states (so a previous and current value can be stored) and forward the replace parameter to every call of setResult like here: https://github.com/bennycode/trading-signals/blob/v5.0.3/src/DX/DX.ts#L87

[bennycode]

Hi @ozum, I just published trading-signals v6 and it comes with support for the replace parameter in the update function for all indicators. The indicators now even have their own replace function. Hope it works for you! 🥳