diff --git a/src/models/bar_options.ts b/src/models/bar_options.ts
index e69de29..93f6269 100644
--- a/src/models/bar_options.ts
+++ b/src/models/bar_options.ts
@@ -0,0 +1,29 @@
+import { CoreSeries } from '@chartwerk/core';
+import { ScatterData, PointType, LineType } from '../types';
+
+import * as _ from 'lodash';
+
+const DEFAULT_POINT_SIZE = 4;
+
+const SCATTER_DATA_DEFAULTS = {
+  pointType: PointType.CIRCLE,
+  lineType: LineType.NONE,
+  pointSize: DEFAULT_POINT_SIZE,
+  colorFormatter: undefined
+};
+
+export class ScatterSeries extends CoreSeries<ScatterData> {
+
+  constructor(series: ScatterData[]) {
+    super(series);
+  }
+
+  protected get defaults(): ScatterData {
+    return { ...this._coreDefaults, ...SCATTER_DATA_DEFAULTS };
+  }
+
+  // move to parent
+  public getSerieByTarget(target: string): ScatterData | undefined {
+    return _.find(this.visibleSeries, serie => serie.target === target);
+  }
+}
diff --git a/src/models/bar_series.ts b/src/models/bar_series.ts
index e69de29..93f6269 100644
--- a/src/models/bar_series.ts
+++ b/src/models/bar_series.ts
@@ -0,0 +1,29 @@
+import { CoreSeries } from '@chartwerk/core';
+import { ScatterData, PointType, LineType } from '../types';
+
+import * as _ from 'lodash';
+
+const DEFAULT_POINT_SIZE = 4;
+
+const SCATTER_DATA_DEFAULTS = {
+  pointType: PointType.CIRCLE,
+  lineType: LineType.NONE,
+  pointSize: DEFAULT_POINT_SIZE,
+  colorFormatter: undefined
+};
+
+export class ScatterSeries extends CoreSeries<ScatterData> {
+
+  constructor(series: ScatterData[]) {
+    super(series);
+  }
+
+  protected get defaults(): ScatterData {
+    return { ...this._coreDefaults, ...SCATTER_DATA_DEFAULTS };
+  }
+
+  // move to parent
+  public getSerieByTarget(target: string): ScatterData | undefined {
+    return _.find(this.visibleSeries, serie => serie.target === target);
+  }
+}